HLA-DR matching and pool size requirements.
D005787:Gene Frequency; D000949:Histocompatibility Antigens Class II / Q000235:genetics*; D006650:Histocompatibility Testing; D006801:Humans; D016030:Kidney Transplantation; D014181:Transplantation Immunology
D000949:Histocompatibility Antigens Class II