RT Journal Article SR Electronic T1 Comparison of the anti-cyclic citrullinated peptide and rheumatoid factor in rheumatoid arthritis at an arthritis center JF Saudi Medical Journal JO Saudi Med J FD Prince Sultan Military Medical City SP 446 OP 447 VO 30 IS 3 A1 Attar, Suzan M. A1 Bunting, Peter S. A1 Smith, Charles D. A1 Karsh, Jacob YR 2009 UL http://smj.org.sa/content/30/3/446.abstract