title: Letter: HL-A antigens in acne conglobata: a negative study.
mesh_terms: D000152:Acne Vulgaris / Q000235:genetics / Q000276:immunology*; D000293:Adolescent; D000328:Adult; D005260:Female; D005787:Gene Frequency; D006649:Histocompatibility Antigens; D006650:Histocompatibility Testing; D006801:Humans; D008297:Male; D008875:Middle Aged; D010641:Phenotype
chemical_list: D006649:Histocompatibility Antigens