<p><sup>a</sup>Four different groups were included to represent homozygosity and heterozygosity for the AH8.1 haplotype (as defined by the presence of HLA-B*0801 and DRB1*0301), absence of this haplotype as well as homozygosity for other DRB1 haplotypes. There were no significant differences (all p>0.23) for any of the parameters when applying Kruskal-Wallis test for continuous and 2x4 chi square test for categorical parameters.</p><p><sup>b</sup>Transport time as defined by time from sampling to the freezer.</p><p>Characteristics of the study population according to HLA genotype<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0133804#t002fn001" target="_blank"><sup>a</sup></a>.</p
