New DR subtypes included in MT2.
D000937:Antigen-Antibody Reactions; D008040:Genetic Linkage; D006684:HLA-DR Antigens; D000949:Histocompatibility Antigens Class II / Q000235:genetics* / Q000276:immunology; D006801:Humans; D007564:Japan
D006684:HLA-DR Antigens; D000949:Histocompatibility Antigens Class II