1. Department of Endocrinology and Kogod Center of AgingMayo Clinic College of Medicine Rochester Minnesota
2. Division of Laboratory Medicine, Department of Pathology and Cell Biology, Vagelos College of Physicians and SurgeonsColumbia University Irving Medical Center New York City New York
3. Division of Endocrinology, Department of Medicine, Vagelos College of Physicians and SurgeonsColumbia University Irving Medical Center New York City New York
4. Mellanby Centre for Bone Research, Medical SchoolUniversity of Sheffield Sheffield UK
5. Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal SciencesThe Oxford University Institute of Musculoskeletal Sciences, The Botnar Research Centre, Nuffield Orthopaedic Centre Oxford UK