[1] McMaster Univ, St Josephs Hosp, Hamilton, ON L8N 1Y2, Canada
[2] Univ Verona, Dept Rheumatol, I-37100 Verona, Valeggio, Italy
[3] Univ Massachusetts, Med Ctr, Ctr Outcomes Res, Worcester, MA USA
[4] Katholieke Univ Leuven, Div Geriatr Med, Ctr Metab Bone Dis, Leuven Univ, Louvain, Belgium
[5] Univ Lyon, Div Rheumatol, INSERM, U831,Hop E Harriot, Lyon, France
[6] Univ Cambridge, Addenbrookes Hosp, Sch Clin Med, Cambridge CB2 2QQ, England
[7] Univ Southampton, MRC Epidemiol Resource Ctr, Southampton Gen Hosp, Oxford, England
[8] Univ Oxford, Norman Collisson Chair Musculoskeletal Sci, Oxford, England
[9] Univ Barcelona, Hosp Mar IMIM Autonomous, Barcelona, Spain
[10] Univ Pittsburgh, Pittsburgh, PA USA
[11] Fred Hutchinson Canc Res Ctr, Seattle, WA 98104 USA
[12] Helen Hayes Hosp, Reg Bone Ctr, W Haverstraw, NY USA
[13] Vrije Univ Amsterdam Med Ctr, Dept Endocrinol, Amsterdam, Netherlands
[14] Univ Glasgow, Div Community Based Sci, Fac Med, Glasgow G12 8QQ, Lanark, Scotland
[15] Alfried Krupp Hosp, Dept Internal Med 3, Essen, Germany
[16] Paris Descartes Univ, Cochin Hosp, Paris, France
[17] Univ Alabama, Div Clin Immunol & Rheumatol, Birmingham, AL 35294 USA
[18] Univ Sydney, Royal N Shore Hosp, Sydney, NSW 2006, Australia
[19] Univ Calif Los Angeles, David Geffen Sch Med, Dept Rheumatol, Los Angeles, CA 90095 USA
[20] Columbia Univ, Med Ctr, New York, NY USA
[21] Univ Cincinnati, Bone Hlth & Osteoporosis Ctr, Cincinnati, OH USA