Lack of association of HLA-DR antigens with progressive systemic sclerosis (scleroderma).
D003604:Czechoslovakia; D000949:Histocompatibility Antigens Class II / Q000235:genetics / Q000276:immunology*; D006801:Humans; D012595:Scleroderma, Systemic / Q000453:epidemiology / Q000235:genetics / Q000276:immunology*
D000949:Histocompatibility Antigens Class II