[1] LUMC, Leiden, Netherlands
[2] Cochin Hosp, Paris, France
[3] Univ Hosp Zurich, Zurich, Switzerland
[4] Univ Calif San Francisco, San Fransico, CA USA
[5] Hosp Garcia de Orta, Almada, Portugal
[6] Hosp Univ La Paz, Madrid, Spain
[7] Charite Univ Med Berlin, Berlin, Germany
[8] German Rheumatism Res Ctr, Berlin, Germany
[9] Klinikum Bielefeld Rosenhohe, Bielefeld, Germany
[10] MUMC, Maastricht, Netherlands
[11] Zuyderland MC, Heerlen, Netherlands