1. Department of Orthopaedic SurgeryPerelman School of Medicine, University of Pennsylvania Philadelphia Pennsylvania USA
2. Department of Physiology and Biomedical Engineering RochesterMayo Clinic Minnesota USA
3. Department of MedicineMayo Clinic Rochester Minnesota USA
4. Department of PediatricsPerelman School of Medicine, University of Pennsylvania Philadelphia Pennsylvania USA
5. Division of Endocrinology and DiabetesChildren′s Hospital of Philadelphia Philadelphia Pennsylvania USA
6. Center for Bone HealthChildren′s Hospital of Philadelphia Philadelphia Pennsylvania USA
7. Department of Radiation OncologyPerelman School of Medicine, University of Pennsylvania Philadelphia Pennsylvania USA
8. Department of Physical Medicine and RehabilitationPerelman School of Medicine, University of Pennsylvania Philadelphia Pennsylvania USA
9. Translational Musculoskeletal Research Center (TMRC), Corporal Michael J. Crescenz Veterans Affairs Medical Center Philadelphia Pennsylvania USA