Anti-citrullinated protein antibodies have a low avidity compared to antibodies against recall-antigens. (9th March 2010) - Suwannalai, P; Scherer, H U; van der Woude, D; Ioan-Facsinay, A; der Zijde, C M Jol-van; van Tol, M J; Huizinga, T W J; Toes, R E M; Trouw, L A