RT Journal Article SR Electronic T1 Notes and news JF Annals of the Rheumatic Diseases JO Ann Rheum Dis FD BMJ Publishing Group Ltd and European League Against Rheumatism SP 347 OP 347 DO 10.1136/ard.50.6.347 VO 50 IS 6 YR 1991 UL http://ard.bmj.com/content/50/6/347.abstract AB