1. Division of Bone and Mineral Diseases, Musculoskeletal Research Center; and Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, Missouri, USA;
2. Shriners Hospitals for Children, St. Louis, Missouri, USA
3. Center for Musculoskeletal Disease Research, Division of Endocrinology, and Department of Orthopaedic Surgery, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
4. Central Arkansas Veterans Healthcare System, Little Rock, Arkansas, USA