RT Journal Article SR Electronic T1 What value case reports? JF Annals of the Rheumatic Diseases JO Ann Rheum Dis FD BMJ Publishing Group Ltd and European League Against Rheumatism SP 1 OP 2 DO 10.1136/ard.53.1.1 VO 53 IS 1 A1 Doherty, M YR 1994 UL http://ard.bmj.com/content/53/1/1.abstract AB