[1] Nuffield Orthopaed Ctr, Oxford, England
[2] Harvard Med Sch, Brigham & Womens Hosp, Boston, MA 02115 USA
[3] St Vincents Univ Hosp, Dublin, Ireland
[4] Univ Coll Dublin, Conway Inst Biomol Res, Dublin, Ireland
[5] UC San Diego Sch Med, Div Rheumatol Allergy & Immunol, La Jolla, CA USA
[6] Icahn Sch Med Mt Sinai, Dept Dermatol, New York, NY 10029 USA
[7] Royal Natl Hosp Rheumat Dis, Bath, Avon, England
[8] UCB Pharma, Monheim, Germany
[9] Swedish Med Ctr, Seattle, WA USA
[10] Univ Washington, Seattle, WA 98195 USA
[11] Univ Leeds, Leeds Inst Rheumat & Musculoskeletal Med, Leeds, W Yorkshire, England
[12] Leiden Univ, Med Ctr, Leiden, Netherlands