FRI0640 Autoantibodies to two novel peptides in seronegative and early rheumatoid arthritis in three large independent cohorts

[De Winter, L.; Vandormael, P.; Geusens, P.; Somers, V.] Univ Limburg, Sch Life Sci, Hasselt Univ & Transnatl, Biomed Res Inst, Hasselt, Belgium. [Stouten, V.; Verschueren, P.] KULeuven, Dept Dev & Regenerat, Skeletat Biol & Engn Res Ctr, Leuven, Belgium. [van Steenbergen, H. W.; van der Helm-van Mil, A. H. M.] Leiden Univ, Dept Rheumatol, Med Ctr, Leiden, Netherlands. [Geusens, P.] ReumaClin, Genk, Belgium. [Geusens, P.] Maastricht Univ, Med Ctr, Rheumatol, Maastricht, Netherlands. [Lenaerts, J.] Reuma Inst, Hasselt, Belgium. [Lenaerts, J.] Jessa Hosp, Hasselt, Belgium.