The PTPN22 susceptibility risk variant is not associated with the rate of joint destruction in anti-citrullinated protein antibody-positive rheumatoid arthritis. Issue 9 (13th April 2010) - van Nies, J A B; Knevel, R; Daha, N; van der Linden, M P M; Gregersen, P K; Kern, M; le Cessie, S; Houwing-Duistermaat, J J; Huizinga, T W J; Toes, R E M; van der Helm-van Mil, A H M