[1] IPBLN CSIC, Armilla, Granada, Spain
[2] Radboud Univ Nijmegen, Med Ctr, Dept Rheumatol, NL-6525 ED Nijmegen, Netherlands
[3] UT MD Anderson Canc Ctr, Houston, TX USA
[4] Vrije Univ Amsterdam, Med Ctr, Amsterdam, Netherlands
[5] Leids Univ, Med Ctr, Leiden, Netherlands
[6] Catholic Univ Louvain, Clin Univ St Luc, B-1200 Brussels, Belgium
[7] Ghent Univ Hosp, Dept Rheumatol, Ghent, Belgium
[8] Univ Hosp KU Leuven, Louvain, Belgium
[9] Ghent Univ Hosp, Ctr Med Genet, Ghent, Belgium
[10] Ruhr Univ Bochum, Bochum, Germany
[11] Charite, German Rheumatol Res Ctr, Berlin, Germany
[12] Lund Univ, Lund, Sweden
[13] Skane Univ Hopsital, Lund, Sweden
[14] Karolinska Inst, Stockholm, Sweden
[15] Oslo Univ Hosp, Rikshosp, Oslo, Norway
[16] Univ Cologne, D-50931 Cologne, Germany
[17] Univ Milan, Milan, Italy
[18] IRCCS Fdn, Policlin Mangiagalli Regina Elena, Milan, Italy
[19] Univ Texas Hlth Sci Ctr Houston, Houston, TX USA
[20] Inst Parasitol & Biomed Lopez Neyra CSIC, Granada, Spain
[21] Univ Med Ctr Utrecht, Utrecht, Netherlands