1. Department of Medicine, Geriatric Medicine & Gerontology, Mayo Clinic, Rochester, MN 55905, USA
2. Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN 55905, USA
3. Department of Orthopaedic Surgery, The Perelman School of Medicine of the University of Pennsylvania, Philadelphia, PA 19104, USA
4. Department of Medicine, The Perelman School of Medicine of the University of Pennsylvania, Philadelphia, PA 19104, USA
5. The Center for Research in FOP and Related Disorders, The Perelman School of Medicine of the University of Pennsylvania, Philadelphia, PA 19104, USA
6. Department of Medicine, Divisions of Endocrinology, Hospital Internal Medicine, Rochester, MN 55905, USA