title: Loss of reactivity of HL-A antigens in clonal populations of cultured human fibroblasts durin aging in vitro.
mesh_terms: D000375:Aging; D002478:Cells, Cultured / Q000276:immunology; D002999:Clone Cells / Q000276:immunology; D004194:Disease; D005347:Fibroblasts / Q000276:immunology*; D006649:Histocompatibility Antigens; D006801:Humans; D009369:Neoplasms / Q000209:etiology; D013997:Time Factors
chemical_list: D006649:Histocompatibility Antigens