HLA-DRB1 and type 1 diabetes mellitus: Glu (E) was significantly more frequently observed than Trp (W) (represented as E>W, the same applies hereafter) at position 9 (Figure 1A), Ser (S) > Asp (D) at position 57 (Figure 1B), Gly (G) > Val (V) at position 86 (Figure 1C), and Tyr (Y) > Gln (Q) at position 96 of HLA-DRβ1 in ICI-T1DM (Figure 1D).