[1] Univ Liege, Dept Publ Hlth Epidemiol & Hlth Econ, B-4020 Liege, Belgium
[2] Univ Florence, Dept Internal Med, Bone Metab Unit, Florence, Italy
[3] Univ Oviedo, Hosp Univ Cent Asturias, Serv Metabol Oseo & Mineral, Oviedo, Asturias, Spain
[4] Univ Southampton, MRC Lifecourse Epidemiol Unit, Southampton, Hants, England
[5] Univ Southampton, NIHR Nutr Biomed Res Ctr, Southampton, Hants, England
[6] Hop Roger Salengro, Serv Rhumatol, Lille, France
[7] UPMC, Hop St Antoine, Serv Chirurg Orthoped & Traumatolog, Paris, France
[8] Univ Calif San Francisco, Dept Radiol, Dept Med, Dept Epidemiol, San Francisco, CA 94143 USA
[9] Univ Calif San Francisco, Dept Orthoped Surg, San Francisco, CA 94143 USA
[10] Inst Palacios Salud & Med Mujer, Madrid, Spain
[11] Univ Cologne, Klinikum Leverkusen, Akadem, Lehrkrankenhaus,Med Klin 4, D-50931 Cologne, Germany
[12] Univ Hosp Geneva, Fac Med, Div Bone Dis, Geneva, Switzerland