HLA-DOB and graft versus host disease: Previous studies by Petersdorf et al. revealed that the rs2242656 of BAG6, rs986522 of COL11A2, rs2244546 of HCP5, rs2523957 of MICD, rs429916 of HLA-DOA, rs2071479 of HLA-DOB, rs107822 of RING1, and rs209130 of TRIM27 are related to the risk of relapse, survival rate, or graft-versus-host disease (GVHD) in patients receiving bone marrow stem cell transplantation8.