title: [A study of risk factors].
authors: M
authors: M
authors: van der Linden
mesh_terms: D016022:Case-Control Studies; D006680:HLA Antigens / Q000276:immunology; D006801:Humans; D012216:Rheumatic Diseases / Q000453:epidemiology* / Q000276:immunology; D012307:Risk Factors; D013167:Spondylitis, Ankylosing / Q000276:immunology
chemical_list: D006680:HLA Antigens
vernacular_title: Izuchenie faktorov riska.