[1] McMaster Univ, St Josephs Hosp, Hamilton, ON L8N 1Y2, Canada
[2] Univ Massachusetts, Sch Med, Ctr Outcomes Res, Worcester, MA USA
[3] Univ Lyon, Div Rheumatol, Hosp Civils Lyon, Hop E Herriot,INSERM UMR 1033, Lyon, France
[4] Univ Alabama Birmingham, Birmingham, AL USA
[5] Cedars Sinai Med Ctr, Dept Rheumatol, Los Angeles, CA 90048 USA
[6] Katholieke Univ Leuven, Leuven Univ Ctr Metab Bone Dis, Div Geriatr Med, Louvain, Belgium
[7] Univ Cambridge, Addenbrookes Hosp, Sch Clin Med, Cambridge CB2 2QQ, England
[8] Univ Southampton, MRC Lifecourse Epidemiol Unit, Southampton, Hants, England
[9] Autonomous Univ Barcelona, Hosp Mar, IMIM, Barcelona, Spain
[10] ISCIII Madrid, RETICEF, Madrid, Spain
[11] Univ Pittsburgh, Pittsburgh, PA USA
[12] Fred Hutchinson Canc Res Ctr, Seattle, WA 98104 USA
[13] Helen Hayes Hosp, Reg Bone Ctr, W Haverstraw, NY USA
[14] Vrije Univ Amsterdam, Med Ctr, Dept Endocrinol, Amsterdam, Netherlands
[15] Alfried Krupp Hosp, Dept Internal Med 3, Essen, Germany
[16] Univ Verona, Rheumatol Sect, Dept Med, I-37100 Verona, Italy
[17] Paris Descartes Univ, Cochin Hosp, Paris, France
[18] Univ Sydney, Royal N Shore Hosp, Sydney, NSW 2006, Australia
[19] Columbia Univ, Med Ctr, New York, NY USA
[20] Univ Cincinnati, Bone Hlth & Osteoporosis Ctr, Cincinnati, OH USA