[1] Univ Massachusetts, Sch Med, Worcester, MA 01605 USA
[2] Univ Louvain, Ctr Metab Bone Dis, Louvain, Belgium
[3] Univ Verona, I-37100 Verona, Italy
[4] Univ Lyon, INSERM, Res Unit 831, Lyon, France
[5] Paris Descartes Univ, Cochin Hosp, Paris, France
[6] Cambridge Univ Hosp NHS Fdn Trust, Cambridge, England
[7] Univ Southampton, MRC, Epidemiol Resource Ctr, Southampton, Hants, England
[8] Hosp del Mar, IMIM, Barcelona, Spain
[9] Vrije Univ Amsterdam, Ctr Med, Amsterdam, Netherlands
[10] Alfried Krupp Hosp, Essen, Germany