[1] Univ Louvain, Louvain, Belgium
[2] Univ Bern, Bern, Switzerland
[3] Charlton Med Ctr, Hamilton, ON, Canada
[4] CPMC Res Inst, SFCC, San Francisco, CA USA
[5] UCSF, San Francisco, CA USA
[6] Ctr TIEMPO, Buenos Aires, DF, Argentina
[7] Hosp Santa Creu & Sant Pau, Barcelona, Spain
[8] Karolinska Inst Sodersjukhuset, Stockholm, Sweden
[9] Creighton Univ, Med Ctr, Omaha, NE USA
[10] Amgen Inc, Thousand Oaks, CA 91320 USA
[11] Oregon Osteoporosis Ctr, Portland, OR USA