title: Acute and chronic graft versus host disease: histopathological evidence for two distinct pathogenetic mechanisms.
mesh_terms: D000208:Acute Disease; D001696:Biomechanical Phenomena; D002908:Chronic Disease; D006086:Graft vs Host Disease / Q000209:etiology / Q000276:immunology / Q000473:pathology / Q000503:physiopathology*; D006648:Histocompatibility; D006801:Humans; D007694:Killer Cells, Natural / Q000276:immunology