RT Journal Article SR Electronic T1 Connective Tissue Diseases JF Annals of the Rheumatic Diseases JO Ann Rheum Dis FD BMJ Publishing Group Ltd and European League Against Rheumatism SP 300 OP 300 DO 10.1136/ard.37.3.300-b VO 37 IS 3 A1 Perry, J. D. YR 1978 UL http://ard.bmj.com/content/37/3/300.2.abstract AB