RT Journal Article SR Electronic T1 Happy families JF Annals of the Rheumatic Diseases JO Ann Rheum Dis FD BMJ Publishing Group Ltd and European League Against Rheumatism SP 149 OP 150 DO 10.1136/ard.56.3.149 VO 56 IS 3 A1 OLLIER, BILL A1 WORTHINGTON, JANE YR 1997 UL http://ard.bmj.com/content/56/3/149.abstract AB