Serum folic acid in patients with rheumatoid arthritis.
D001172:Arthritis, Rheumatoid / Q000097:blood*; D004906:Erythrocyte Count; D005260:Female; D005492:Folic Acid / Q000097:blood*; D006801:Humans; D008297:Male; D013167:Spondylitis, Ankylosing / Q000097:blood*; D005719:gamma-Globulins / Q000032:analysis
D005719:gamma-Globulins; D005492:Folic Acid