[1] Med Ctr Rheumatol, Munich, Germany
[2] Humanitas Res Hosp, Rheumatol & Clin Immunol Unit, Rozzano, MI, Italy
[3] Univ Milan, B1OMETRA Dept, Milan, Italy
[4] CHU, Ctr Rheumatol, Toulouse, France
[5] Hosp Virgen Puerto, FEA Reumatol, Caceres, Spain
[6] Biogen Int GmbH, Zug, Switzerland
[7] Biogen Idec Inc, Maidenhead, Berks, England