RT Journal Article SR Electronic T1 Ronald Grey Gordon JF Annals of the Rheumatic Diseases JO Ann Rheum Dis FD BMJ Publishing Group Ltd and European League Against Rheumatism SP 279 OP 279 DO 10.1136/ard.9.3.279 VO 9 IS 3 A1 G. D. Kersley YR 1950 UL http://ard.bmj.com/content/9/3/279.abstract AB