RT Journal Article SR Electronic T1 Nature of anaemia in rheumatoid arthritis. IX. Folate metabolism in patients with rheumatoid arthritis. JF Annals of the Rheumatic Diseases JO Ann Rheum Dis FD BMJ Publishing Group Ltd and European League Against Rheumatism SP 414 OP 424 DO 10.1136/ard.27.5.414 VO 27 IS 5 A1 Omer, A A1 Mowat, A G YR 1968 UL http://ard.bmj.com/content/27/5/414.abstract AB