RT Journal Article SR Electronic T1 Antiperinuclear factor test is more useful than anti-Sa assay when used with anti-cyclic citrullinated peptide test in diagnosis of rheumatoid arthritis. JF The Journal of Rheumatology JO J Rheumatol FD The Journal of Rheumatology SP 1944 OP 1945 VO 34 IS 9 A1 Duck-An Kim A1 La-He Jearn A1 Think-You Kim YR 2007 UL http://www.jrheum.org/content/34/9/1944.abstract AB