CD4 and inclusion body myositis: We found that the IBM disease duration was not correlated with the proportion of CD57+KLRG1+ in any of the CD8+ (Spearman’s r=0.13, P=0.35), CD4+ (Spearman’s r=0.10, P=0.23) or γδ T cells subsets (Spearman’s r= 0.0077, P=0.96; Figures 9C–E respectively).