RT Journal Article SR Electronic T1 Protective Effect of Traumatic Lesions on Rheumatoid Arthritis JF Annals of the Rheumatic Diseases JO Ann Rheum Dis FD BMJ Publishing Group Ltd and European League Against Rheumatism SP 361 OP 363 DO 10.1136/ard.25.4.361 VO 25 IS 4 A1 J. S. Kamermann YR 1966 UL http://ard.bmj.com/content/25/4/361.abstract AB