RT Journal Article SR Electronic T1 Genetic association studies in systemic sclerosis: more evidence of a complex disease. JF The Journal of Rheumatology JO J Rheumatol FD The Journal of Rheumatology SP 903 OP 905 VO 34 IS 5 A1 Carmen Fonseca A1 Christopher P Denton YR 2007 UL http://www.jrheum.org/content/34/5/903.abstract AB