[1] Univ Med Ctr, Dept Med 3, Div Rheumatol, Dresden, Germany
[2] Tech Univ Dresden, Fac Med Carl Gustav Carus, Dresden, Germany
[3] Harvard Med Sch, Brigham & Womens Hosp, Dept Med, Div Rheumatol & Immunol, Boston, MA 02115 USA
[4] Free Univ Berlin, Charite Univ Med Berlin, Dept Rheumatol & Clin Immunol, Berlin, Germany
[5] Humboldt Univ, Berlin, Germany
[6] Berlin Inst Hlth, Berlin, Germany
[7] Toronto Western Hosp, Mt Sinai Hosp, Div Rheumatol, Dept Med, Toronto, ON, Canada
[8] Univ Toronto, Inst Hlth Policy Management & Evaluat, Toronto, ON, Canada