1San Francisco Coordinating Center, California Pacific Medical Center Research Institute and University of California, San Francisco, San Francisco
2Amgen, Thousand Oaks, CA
3Oregon Osteoporosis Center, Portland
4Columbia University Medical Center, New York
5University of Sheffield, Sheffield, United Kingdom
6University of Auckland, Auckland, New Zealand
7Université de Lyon and INSERM Research Unit 831, Lyon, France
8Center for Clinical and Basic Research, Pardubice, Czech Republic
9University of Verona, Verona, Italy
10Instituto de Investigaciones Metabolicas and University of Salvador, Buenos Aires, Argentina
11Center for Clinical and Basic Research, Ballerup, Denmark