RT Journal Article SR Electronic T1 Genetic Studies on Rheumatoid Arthritis JF Annals of the Rheumatic Diseases JO Ann Rheum Dis FD BMJ Publishing Group Ltd and European League Against Rheumatism SP 160 OP 168 DO 10.1136/ard.17.2.160 VO 17 IS 2 A1 Lawrence, J. S. A1 Ball, J. YR 1958 UL http://ard.bmj.com/content/17/2/160.abstract AB