[1] Southampton Univ Hosp, Southampton, Hants, England
[2] West Tennessee Res Inst, Jackson, TN USA
[3] Univ Sheffield, Sheffield, S Yorkshire, England
[4] Altoona Arthrit & Osteoporosis Ctr, Duncansville, PA USA
[5] Combined Rheumatol Practice, Kogarah, NSW, Australia
[6] Celgene Corp, Warren, NJ USA
[7] Rheumatol & Immunotherapy Ctr, Franklin, WI USA