6%; Table 2) that did not differ significantly from dMMR tumors o

6%; Table 2) that did not differ significantly from dMMR tumors of the sporadic subtype or pMMR tumors lacking BRAFV600E and KRAS mutations ( Table 4). Of note, DFS for dMMR tumors of the familial subtype was poorer among distal vs proximal tumors ( Figure 2A and B). Among distal pMMR cancers, statistically significant differences in DFS were found only for KRAS-mutated tumors (vs those without KRAS and BRAF mutations), yet statistical

power was limited ( Table 4). A trend toward better DFS was found in distal vs proximal tumors with BRAFV600E mutations and tumors without BRAFV600E or KRAS mutations ( Table 2). Among patients with N1 tumors, the association of tumor subtypes with DFS did not differ significantly from the overall Idelalisib datasheet cohort (Figures 1B and 2C). Among patients with N2 tumors, however, poor DFS was observed for dMMR tumors of the sporadic subtype ( Table 2, Figure 2D) that did not differ significantly from DFS of pMMR subtypes with mutated KRAS (Padjusted = .9195) or mutated

BRAFV600E (Padjusted = .8231) ( Table 4). In contrast, N1 tumors of the dMMR sporadic subtype had DFS rates that were significantly improved selleck screening library compared with DFS of patients with pMMR mutated KRAS tumors (HR = 0.51; 95% CI: 0.31–0.82; Padjusted = .0054), or showed a strong trend vs the mutated BRAFV600E (HR = 0.50; 95% CI: 0.28–0.91; Padjusted = .0238) subtype ( Figure 2C). We attempted to validate the prognostic L-NAME HCl utility of our classifier in an independent

cohort of stage III colon cancer patients treated with 5-FU–based adjuvant chemotherapy. Patients from this external cohort were categorized into the same molecular subtypes as in our dataset, with the exception that dMMR tumors were divided based on BRAF status alone (see Materials and Methods). In this independent cohort, a statistically significant difference was seen among the 5 molecular subtypes (P = .014) as was demonstrated in the primary N0147 cohort ( Figure 3). A similarly favorable outcome for pMMR tumors lacking BRAFV600E or KRAS mutations and dMMR tumors was observed. In addition, poorer DFS among patients with BRAFV600E mutant or KRAS mutant pMMR cancers was observed as reflected in their 5-year DFS rates ( Figure 3, Table 2). Accordingly, the key prognostic findings of our biomarker classifier were validated. In patients undergoing surgical resection of CRC, prognosis and management are based entirely on the TNM staging system,24 despite considerable stage-independent variability in outcomes. Accordingly, prognostic classifiers that can be readily implemented into clinical practice are needed to enhance clinical decision making. In stage III colon cancers from a recent adjuvant chemotherapy trial,26 we classified tumors into 5 prespecified subtypes using a biomarker combination of BRAFV600E and KRAS mutations, MLH1 methylation, and MMR status.

Although GWAS have been successful in identifying variants that i

Although GWAS have been successful in identifying variants that influence a number of traits, there are still many exposures for which we do not yet have INK 128 order suitable instruments. In addition, genetic variants may be population-specific and not suitable for use in all ancestral groups. For example, a variant in the ALDH2 gene, which strongly influences alcohol consumption, is used in MR studies in East Asian populations, but occurs at too low a frequency for use in MR studies in European populations [30]. Crucially, genetic variants in MR studies must be associated with

the exposure of interest within the analysis sample and must show robust evidence for association with the same exposure in independent samples. Performing MR analyses using genetic instruments that have been discovered within the analysis sample but have not been independently replicated can lead to causal inference in the absence of true causal effects, because associations between genetic variants and exposures may just be chance findings. In addition, as effect sizes between genetic variants and phenotypes are often inflated in discovery samples (also known as the Beavis effect or Winner’s Curse), performing MR analyses within

discovery samples can result in biased causal effect sizes [31]. Biased estimates of effect sizes may also be obtained if the measured exposure does not fully capture the causal exposure through which the genetic variant operates [31]. For example, a variant in the nicotinic receptor alpha-5 subunit protein, rs16969968, influences lifetime tobacco find more exposure, but this is not well captured by self-report measures of smoking (e.g., cigarettes per day). MR of lung cancer data using cigarettes per day as the intermediate variable indicates a causal odds ratio for lung cancer of 2180 per pack of cigarettes smoked per day, compared to only 2.6 from observational analysis [32]. By

contrast, using cotinine, a metabolite of nicotine and a more precise objective measure of tobacco exposure, produces effect sizes during which are more consistent with observational findings [33]. In the absence of appropriate intermediate exposure measures, MR can still be used to infer causality, but it may not be possible to accurately estimate causal magnitudes of effect. Furthermore, MR studies can be informative about the effects of lifelong exposure to a risk factor, but are usually not appropriate for investigating the impact of short-term changes in risk factors on health outcomes. MR studies will also rarely provide information about the mechanisms underlying a causal relationship (although two-step MR can provide this). Although MR can minimise many of the biases associated with conventional epidemiological studies, there are ways in which MR can still be confounded.

Phytoplankton cells draw the energy to drive photosynthesis from

Phytoplankton cells draw the energy to drive photosynthesis from the sunlight entering the sea water. The quanta of this light are selectively absorbed by the various pigments contained in these cells. selleck chemicals llc However, only part of the energy activating the pigment molecules as a result of light absorption is expended during photosynthesis; the remainder is deactivated in two other processes, namely, fluorescence, and radiationless nonphotochemical quenching, which generates heat (Butler and Kitajima, 1975, Weis and Berry, 1987, Kolber and Falkowski,

1993 and Ostrowska, 2001). The objective of the present work is to investigate and model the distribution of the activation energy of phytoplankton pigment molecules among these three processes under the many and various conditions prevailing in the

marine environment. Photosynthesis itself is, of course, the most important of the three processes, its yield being governed by environmental factors determining their utilization of this energy. Our models describe the distribution of this energy by comparing the quantum yields and energy efficiencies of the three processes. These yields/efficiencies are complex functions of environmental state parameters. Our models take these relationships into account and enable the distribution of the pigment excitation energy to be calculated for the various http://www.selleckchem.com/products/AZD6244.html typical conditions obtaining in the waters of the World Ocean. The light-absorbing pigments in phytoplankton cells can be classified into two groups. One comprises the photosynthetic pigments, PSPs (the main abbreviations and symbols used in the text are listed in Annex 1), contains chlorophyll a and a set of pigments accessory to chlorophyll a. These accessory pigments absorb light from different spectral bands, and the energy thereby acquired drives the processes contributing to the photosynthesis

of organic matter. Plant cells form PSPs in order to make optimal use of the light spectrum available in their particular living environment. The other group consists of Clomifene photoprotecting pigments (PPPs), which protect chlorophyll a at the photosynthetic reaction centres from an undesirable excess of light energy (e.g. Bartley and Scolnik, 1995, Majchrowski, 2001, Pascal et al., 2005 and Woźniak and Dera, 2007). Figure 1 shows in a simplified way how these pigments absorb this energy and how it is distributed among the various processes. Excited PPP molecules are mainly deactivated as a result of radiationless transitions, during which they release their excitation energy EAPPP to the surroundings in the form of heat EH1.

, 2005) Sequences were then assembled into contigs using the OAS

, 2005). Sequences were then assembled into contigs using the OASES sequence assembly software (Schultz et al., 2012). OASES Kmer lengths of between 49 and 59 were evaluated to determine the optimal contig size. Contig ID Protein Tyrosine Kinase inhibitor was determined using a stand-alone BLASTx search against

the Ensembl zebrafish protein database (version Zv8.59, E-value < 1e-10) and contigs that could not be assigned to zebrafish transcripts, splice variants or non-conserved regions of known proteins were eliminated from further analysis. The zebra fish proteome was chosen for identification of contigs despite the fact that databases for species more closely related to barramundi are available (i.e. Takifugu rubripes, Tetraodon nigroviridis), they are not as thoroughly annotated and did not return as high a number of BLASTx matches to known proteins. Sequence reads were then mapped to annotated contigs using Novacraft software ( Li et al., 2009) with count data recorded for each annotated gene

within each sample pool of interest. Weight differences between northern and southern barramundi reared at 36 °C, 28 °C and 22 °C Z-VAD-FMK price were statistically compared by means of ANOVA. Homogeneity of variance was confirmed using a Levene’s test and differences of p < 0.05 between time points were considered significant. All ANOVA testing was performed using SPSS v 16.0 (SPSS, 2006). To detect differentially expressed genes between all four experimental comparisons (N22 vs. N36, N22 vs. S22, N36 vs. S36 and S22 vs. S36) the edgeR package (Robinson et al., 2010) was used in conjunction with R software and customized script commands. Program estimated method of dispersion was generated and applied to the data with a false discovery rate (FDR) cutoff of ≤ 0.05. Gene ontology analysis was then performed upon contigs identified as differentially expressed using the goseq R Bioconductor package (Young et al., 2010) to retrieve

information relating to cellular components, biological processes and molecular functions. Weight data was recorded for both southern and northern barramundi populations reared for ~ 3.5 months (106 days) at 22 °C, 28 °C and 36 °C as a measure of growth and to compare the performance of each population at different temperatures. At a rearing temperature Adenosine of 22 °C southern barramundi showed significantly higher growth after 106 days than northern barramundi (p < 0.001) (Table 1). As expected, at the control rearing temperature of 28 °C there was no significant growth differences between southern and northern barramundi and there were also no recorded growth differences in the final weights of both southern and northern barramundi grown at 36 °C (Table 1.). Within populations, southern barramundi showed significantly higher end weights at 28 °C than at either 22 °C or 36 °C (p < 0.

Hence, plotting as in Fig 6b the left side expression as a funct

Hence, plotting as in Fig. 6b the left side expression as a function of (c+ + c−) yields the exchange rate kf from the value of the intercept. Since factor K is also extracted from the slope, the other parameters can be derived as [12]: equation(13a) kb=(Rav+-Rav-)2-K24kf equation(13b) Rf=Rav++Rav-+K2-kf equation(13c) Rb=Rav++Rav–K2-kbwhere index “av” indicates the average value of the fitted R+ and R− parameters. The different

parameters extracted from the find more fits performed in Fig. 6 are represented in Table 1. The intercept in Fig. 6b is precisely defined (note the relative scale on the vertical axis). However, one should keep in mind that the model is based on a number of assumptions (among others, a single exchange event with a unique exchange rate) and therefore precision does not necessarily imply the validity of the model. Hence, the longitudinal relaxation rate of the agarose obtained via Eq. (13c) is selleck chemicals negative which is unphysical and is a clear indicator of the incompleteness of the simple two-phase model. As we shall discuss below, this has important implications concerning experimental strategies. From the data, an average exchange time Tex can be calculated on the conventional

manner as equation(14) Tex=kf+kbkfkb We obtained Tex = 8.1 ms which was in the same order as previous measurements for water in aspen wood (16 ms) [48], in poly [2-hydroxyethyl-methacrylaye] (21.1 ms) [12], in polyelectrolyte multilayers (24.6 ms) [37] and in filter paper (44 ms) [4]. Since the water transverse relaxation time T2 in this system was short (<1 ms), water diffusion experiments in the agarose-water gel require stimulated-echo experiments where the diffusion time Δ used can be up to the much longer longitudinal relaxation time T1 (∼400 ms). Fig. 7a presents the results of diffusion measurements with Δ varying from 5 ms to 50 ms and fitted using Eq. (1). As shown in Fig. 7b (red square), the fitted apparent diffusion coefficients using Eq. (1)

decrease with increasing diffusion time, a feature that could easily be misinterpreted SPTLC1 as a sign of restricted or obstructed diffusion. Fitting the data to Eq. (7a) with exchange rates set to the values in Table 1 (purple square in Fig. 7b) is supposed to correct for the exchange [4], [6], [7], [8], [9] and [12] effects in the diffusional decay. Indeed, this provides higher apparent diffusion coefficients which is as expected, since magnetization exchange with immobile agarose decreases average displacement compared to that with magnetization residing exclusively in mobile water molecules. Under our experimental conditions, the approximation Δ ≈ τ2 may have been invalid for our shortest diffusion times; for those cases, it was therefore important to use a signal expression [6] which did not rely this approximation equation(15) E(q)=e-AΔ-δ3eAτ22coshBτ22-A+CBsinhBτ22coshB0τ22-CB0sinhB0τ22with constants A, B, B0 and C defined in Appendix A.

As seen below, when developing its recommended preferred alternat

As seen below, when developing its recommended preferred alternative to forward TSA HDAC to the Commission, in every region the BRTF modified the recommendations developed through the RSG. To ensure transparency and to ensure that the original work of the RSG received due consideration, the BRTF also transmitted to the Commission the final RSG proposals. Under California law, adoption of new MPAs requires Commission public hearings and input, preparation of proposed regulations to accompany each MPA, identification

of a preferred alternative MPA network and analysis of each of the “project alternatives,” as required under the California Environmental Quality Act (CEQA), culminating in a final Commission action designating the MPAs. As discussed below, in each Nintedanib in vitro of the four study regions the Commission modified the recommendation of the BRTF in selecting its preferred alternative for CEQA review. The CEQA required

project alternatives were developed based on RSG proposals. The Initiative’s work was completed over seven years between 2005 and 2011, with the end of planning in one region overlapping with the launching of information gathering and outreach for the next region (Table 5). State staff, especially from the CDFG, took the lead in regulatory processes after the Initiative BRTF delivered its recommendations to the Commission in a joint meeting. The total time encompassed from initiation of work in a study region to effective regulation for the three completed study regions ranges from 29 to 44 months, with time lengthening in each region. The Initiative was successful at meeting the objectives and timelines of the MOU. Most importantly, the work of the Initiative supported

formal regulatory action Cobimetinib purchase by the Commission establishing an improved network of MPAs in California. Some of the over 60 existing MPAs in the state were terminated, many existing MPAs were changed spatially or in allowed uses and many wholly new MPAs were established. Success is not merely the result of technical expertise, application of the best science, stakeholder involvement or effective management of a complex process. Nominally, under the MOU structuring the Initiative, the MPA proposals forwarded by the BRTF at the end of each study region had to meet the requirements of the MLPA and be based on robust stakeholder processes informed by sound science. However, these technical factors should be considered “necessary, but not sufficient” for success, which also required political skill of those participating in the Initiative. The BRTF recommendation of a preferred alternative had to be politically plausible and the processes had to compel action by the Commission.

We used the finite difference code MODFLOW-SURFACT ( HydroGeoLogi

We used the finite difference code MODFLOW-SURFACT ( HydroGeoLogic, 2011) to obtain numerical solutions to Eq. (1) for the study area. The numerical model encompasses an area of 6.77 ha. Boundary segments are shown in Fig. 1. The segments to the north (inflow) and southeast

(outflow) were treated using head-dependent flux boundaries (General Head Boundary cells in MODFLOW-SURFACT). For the northern inflow boundary, external heads were specified using data from piezometer 45 (Fig. 1). No wells or piezometers were available to the south of the model domain. Therefore, external heads for the outflow boundary were estimated using the interpreted hydraulic gradient in the southeastern PF-562271 manufacturer part of the meadow (Fig. 1). During transient simulations the external boundary heads were varied using available time-series data, which allowed for realistic seasonal variations in the simulated boundary flows. Constant-head cells were used along the southwestern boundary to simulate inflow from the west arm springs. The remainder of the model boundary

was specified as no-flow, following the bedrock outcrop around the meadow. The total modeled Epigenetics inhibitor aquifer thickness is 27.7 m, which is the depth of permeable material determined by packer testing at the Crane Flat pumping well (Section 2). The horizontal grid spacing in most of the model domain is 2 m × 2 m.

Near springs in the southwestern part of the meadow we used larger grid cells. This part of the domain is more than 100 m from the main meadow area and detailed simulation of heads and flow directions was not necessary. The model column spacing was increased gradually from 2 to 10 m in this southwestern area. The aquifer thickness was discretized using seven finite-difference layers. Tacrolimus (FK506) Surveyed ground elevations were used to develop a TIN representation of the land surface. This surface provided a starting point to define the model layers. The top model layer has a uniform thickness of 1 m and is used to locally represent the peat body, which has distinct hydraulic properties, in the fen. Layer 2 is 1.5 m thick, and extends from 1.0 to 2.5 m below the ground surface. The layer spacing was systematically increased and the deepest model layer, 7, has a thickness of 8.3 m. There are 101,389 active grid cells in the model. Given the presence of relatively thin layers near the land surface, some model cells are in the unsaturated zone during flow simulations. In certain areas, the water table drops below the base of a model layer during the summer dry season and may subsequently rise into the layer during periods of higher recharge.

Na zakończenie poczynionych rozważań warto wskazać, że obligatory

Na zakończenie poczynionych rozważań warto wskazać, że obligatoryjny charakter określonych szczepień ochronnych nie zwalania lekarza z odpowiedzialności prawnej. Tym bardziej zasada ta dotyczy szczepień zalecanych. Jeżeli lekarz stwierdza ewentualne przeciwwskazania do wykonania szczepienia ochronnego, kieruje pacjenta na konsultację specjalistyczną. Jeżeli informowany o stanie zdrowia dziecka, jego schorzeniach, SAHA HDAC datasheet przebiegu chorób mogących stanowić przeciwwskazanie

do wykonania szczepienia ochronnego, jest w stanie przewidzieć negatywne konsekwencje zastosowania szczepionki, powinien powstrzymać się od wykonania szczepienia i skierować dziecko do specjalisty. Niezastosowanie się do tych reguł może stanowić brak należytej staranności,

a w konsekwencji może się wiązać z odpowiedzialnością karną i cywilną. Dodatkowo niezmiernie istotne jest sprawowanie należytej opieki medycznej po wystąpieniu odczynów poszczepiennych. Na doniosłość opieki lekarskiej po wystąpieniu odczynów poszczepiennych zwracały uwagę, w kontekście odpowiedzialności świadczeniodawcy, sądy [27] and [28]. Na gruncie omawianej problematyki szczepień ochronnych u dzieci powstają wątpliwości, czy zdrowie jest dobrem publicznym, czy też indywidualnym. Obecnie zdecydowanie przeważa opinia, że zdrowie jest dobrem wspólnym i że korzystają ze zdrowia nie tylko osoby indywidualne, które potrzebują świadczeń medycznych, ale całe społeczności [29]. Stąd w przepisach VE-821 mouse dotyczących szczepień ochronnych, ze względu na ich prewencyjny charakter można znaleźć opisane w pracy ograniczenia konstytucyjnie gwarantowanych wartości. Meloxicam Dotyczą one przede wszystkim obowiązku poddania dzieci szczepieniom ochronnym oraz kar za uchylenie się od nich. Podsumowując, należy dojść do wniosku, że mimo pewnego braku przejrzystości

przepisów prawa regulujących kwestię szczepień ochronnych, należy je – jak wszystkie normy prawa związanego z udzielaniem świadczeń – interpretować zgodnie z interesem pacjenta. W tej kwestii jednak również interes społeczeństwa powinien wpłynąć na rozważenie wprowadzenia pewnych zmian legislacyjnych dotyczących wykonania obowiązku szczepień. Opinia publiczna od dawna domaga się wprowadzenia bardziej przejrzystych i precyzyjnych przepisów zapewniających wysoki poziom ochrony. Wydaje się, że biorąc pod uwagę analizę normatywną przeprowadzoną w pracy, w zakresie ochrony prawa w omawianej dziedzinie owe postulaty są nadal aktualne. AA – koncepcja pracy, interpretacja danych, akceptacja ostatecznej wersji, przygotowanie literatury. IW-W – zebranie danych, interpretacja danych, akceptacja ostatecznej wersji. Nie występuje. Nie występuje. Treści przedstawione w artykule są zgodne z zasadami Deklaracji Helsińskiej, dyrektywami EU oraz ujednoliconymi wymaganiami dla czasopism biomedycznych.

, 2005b) Folic acid supplementation of 130 participants of the H

, 2005b). Folic acid supplementation of 130 participants of the HEALS cohort with low blood folate levels RGFP966 mouse reduced blood levels of MMA by 22.2% and total blood arsenic levels by 13.6%, and increased DMA in urine by 10.2% (Gamble et al., 2007). A high prevalence of hyperhomocysteinemia (63% in men and 26% in women) has been reported in Araihazar, Bangladesh,

compared to in the United States (9%) (Gamble et al., 2005a). Plasma total homocysteine was positively correlated with %MMA (r = 0.21) and inversely correlated with %DMA (r = −0.14) in urine, and only weakly correlated with water arsenic concentration (r = 0.05) ( Gamble et al., 2005b). Thus, the elevated prevalence of hyperhomocysteinemia is largely associated with factors other than arsenic water exposure. Environmental factors, most notably smoking status but also betel nut chewing in Bangladesh, have also been reported to reduce folate status, increase homocysteine levels, and affect susceptibility to arsenic toxicity (Chen et al., 2011, Gamble et al., 2005a, Pilsner et al., 2009 and Tungtrongchitr et al., 2003). Cigarette smoking can increase arsenic toxicity by impacting arsenic methylation capacity (likely through folate depletion), as shown for smokers

in Chile compared to non-smokers BIRB 796 in vivo (Hopenhayn-Rich et al., 1996). Cigarette smoking may also contribute additional iAs exposure (ATSDR, 2007 and Feki-Tounsi et al., 2013). Smoking has been reported to have an apparent synergistic effect on arsenic-induced heart disease mortality (Chen et al., 2011), as well as skin lesions in Bangladesh (Chen et al., 2006a) and lung cancer in Taiwan (Chen et al., 2004). Evidence of synergism with smoking is generally

at higher arsenic doses at which arsenic toxicity is occurring, including increased oxidative stress and impairment in DNA repair (Cohen et al., 2013). Duration of and cumulative betel nut use in the HEALS cohort was prospectively associated with increased risk of subclinical atherosclerosis (higher carotid intima-media thickness), including a synergistic effect with smoking (McClintock et al., 2014). many The available evidence reviewed does not indicate that populations in the U.S. would be genetically more sensitive than the Bangladeshi population studied (Islam and Majumder, 2013 and McNulty et al., 2012), particularly at low doses. For a common genetic polymorphism affecting a key enzyme of one-carbon metabolism, methylenetetrahydrofolate reductase (MTHFR, Fig. 2), some evidence suggests that North American populations are not at increased risk of CHD, unlike in other parts of the world, and that a gene-environment interaction (i.e., low folate) determines when an increased risk is expressed (McNulty et al., 2012). Research on polymorphisms in other genes affecting one-carbon metabolism and CVD risk likewise indicates the potential importance of gene-environment interactions regarding nutritional status in elderly U.S. non-Hispanic white men (Normative Aging Study) (Wernimont et al.

Calm water performance of high speed marine craft smaller deadris

Calm water performance of high speed marine craft smaller deadrise angles are considered favourable, reducing the wetted area selleck inhibitor and frictional resistance improving planning efficiency (Savitsky and Koelbel, 1979). However, larger deadrise angles are favourable in rough water, reducing rough water pounding and improving directional stability (Savitsky and Koelbel, 1979). The main section types and their commented effects on ride quality of high speed marine craft are summarised in Table 1. With a forward longitudinal centre of gravity (LCG) trim angle is reduced which at low speeds usually adversely affects sea keeping, making a craft directionally unstable, wet with a greater tendency to broach in following

seas and can reduce transverse stability (Savitsky and Koelbel, 1979). However, at high speeds a forward LCG usually reduces impact accelerations (Savitsky and Koelbel, 1979). Operator skill (Helmsman’s throttle and steering control) has been reported to have a significant effect on high speed marine craft motions (Nieuwenhuis, 2005, Coats and Stark, 2008 and Townsend, 2008). Helmsman’s control is therefore anticipated to be an influential factor in determining the motion exposures experienced by the crew of high speed marine craft. Human tolerance to vibration primarily depends on the complex interactions GDC-0068 research buy of motion duration, direction, frequency, magnitude and biodynamical, psychological, physiological, pathological

and intra- and inter-subject variabilities. The complex interactions and their effects on humans are not fully understood (Griffin, 1990). However, whole body vibration (WBV), especially those associated with rough vehicle rides, can damage the human body (Griffin, 1998 and Waters et al., 2007). Table 2 shows a summary of WBV experimental studies, injury reports and epidemiological studies. The physical responses of the human body to vibration are commonly represented as a complex system of masses, elasticities, damping and coupling in the low frequency range defined to be below 50 Hz (NASA, 1995). The

responses over specific frequency ranges are found to exhibit most resonance motions which, with sufficient magnitude are anticipated to cause significant biological effects. The resonance frequency ranges associated with various body parts and the specific symptoms and their reported motion occurrences are summarised in Table 3 and Table 4, respectively and Table 5 summarises the motion frequencies that are known to affect human performance. Exposure to these frequency ranges are probable during high speed marine craft transits. Fatigue during high speed marine craft transits reduce the physical and cognitive performance of the occupants (Myers et al., 2008, Myers et al., 2011 and McMorris et al., 2009). This fatigue is often attributed to occupants preferring to support a proportion of their weight through their legs (Gardner et al., 2002, Cripps et al.