Blood groups ABO and Rh (D) factor in the rheumatic diseases.
D000017:ABO Blood-Group System; D001172:Arthritis, Rheumatoid / Q000097:blood; D006801:Humans; D010003:Osteoarthritis / Q000097:blood; D012204:Rh-Hr Blood-Group System; D012216:Rheumatic Diseases / Q000097:blood*; D013167:Spondylitis, Ankylosing / Q000097:blood
D000017:ABO Blood-Group System; D012204:Rh-Hr Blood-Group System