RT Journal Article SR Electronic T1 Progress in the Evolution of Systemic Sclerosis Classification Criteria and Recommendation for Additional Comparative Specificity Studies JF The Journal of Rheumatology JO J Rheumatol FD The Journal of Rheumatology SP 8 OP 10 DO 10.3899/jrheum.141020 VO 42 IS 1 A1 ALFONSE T. MASI A1 THOMAS A. MEDSGER Jr. YR 2015 UL http://www.jrheum.org/content/42/1/8.abstract AB