title: Letter: HL-A 27 (W27) absent in gonococcal arthritis.
mesh_terms: D001170:Arthritis, Infectious / Q000209:etiology / Q000276:immunology*; D005260:Female; D006069:Gonorrhea / Q000150:complications*; D006680:HLA Antigens; D006649:Histocompatibility Antigens; D006801:Humans; D008297:Male
chemical_list: D006680:HLA Antigens; D006649:Histocompatibility Antigens