HLA-DRB1 and dermatomyositis: In our study of Han Chinese patients, the HLA-DRB1*07 allele in the putative haplotype DRB1*07-DQA1*01-DQB1*02 was found to be a risk factor for DM, but the same allele present in the DRB1*07-DQA1*02-DQB1*02 haplotype was reported to be a protector against IIM in Caucasians and African Americans [4,22,25,28].