HLA-DRB1 and myasthenia gravis: The HLA class II allele HLA-DRB1*16,-DRB1*14 and -DQB1*05 allele is linked to MuSK-MG [73,103,104], and also HLA-DRB1*03 appears to have a distinguishing role for this subgroup compared to AChR-MG [103].