HLA-B and Behcet disease: The most frequent HLA-B*51 two-digit alleles associated with BD differed among populations:Europe, HLA-B*5108 (OR 11.25 C.I. 4.9–26)Turkey, HLA-B*5101 (OR 5.98 C.I. 3.7–9.8)Japan, HLA-B*5102 (OR 5.39 C.I. 0.6–47) HLA class I alleles associated with risk for BD are B*5108, B*51, B*5101, B*5102, DQB1-03, A*2601, Cw14, Cw15, Cw16, B*15, and A*26