[1] Columbia Univ, Irving Med Ctr, Vagelos Coll Phys & Surg, Div Lab Med,Dept Pathol & Cell Biol, New York, NY 10032 USA
[2] Columbia Univ, Irving Med Ctr, Vagelos Coll Phys & Surg, Div Endocrinol,Dept Med, New York, NY USA
[3] Mayo Clin, Coll Med, Dept Endocrinol, Rochester, MN USA
[4] Mayo Clin, Coll Med, Kogod Ctr Aging, Rochester, MN USA
[5] Univ Rochester, Dept Chem, Rochester, NY USA
[6] Univ Sheffield, Sch Med, Mellanby Ctr Bone Res, Sheffield, S Yorkshire, England
[7] Univ Oxford, Inst Musculoskeletal Sci, Nuffield Dept Orthopaed Rheumatol & Musculoskelet, Botnar Res Ctr,Nuffield Orthopaed Ctr, Oxford, England