[1] Univ Alberta, Div Rheumatol, Dept Med, Edmonton, AB, Canada
[2] Ruhr Univ Bochum, Rheumazentrum Ruhrgebiet Herne, Herne, Germany
[3] Univ Alberta, Dept Radiol & Diagnost Imaging, Edmonton, AB, Canada
[4] Amsterdam Rheumatol & Immunol Ctr, Dept Clin Immunol & Rheumatol, Amsterdam, Netherlands
[5] Eli Lilly & Co, Lilly Corp Ctr, Indianapolis, IN USA
[6] Eli Lilly & Co, Immunol Med, Brussels, Belgium
[7] Rigshospitalet, Copenhagen Ctr Arthrit Res, Ctr Rheumatol & Spine Dis, Glostrup, Denmark
[8] Univ Copenhagen, Dept Clin Med, Glostrup, Denmark