RT Journal Article SR Electronic T1 The Ætiological Problem of Rheumatism JF Annals of the Rheumatic Diseases JO Ann Rheum Dis FD BMJ Publishing Group Ltd and European League Against Rheumatism SP 67 OP 85 DO 10.1136/ard.1.2.67 VO 1 IS 2 A1 Levinthal, Walter YR 1939 UL http://ard.bmj.com/content/1/2/67.abstract AB