1. Medical Genomics and Metabolic Genetics Branch, National Human Genome Research Institute, National Institutes of Health Bethesda MD USA
2. Department of Pathology Yale University School of Medicine New Haven CT USA
3. Department of Osteology and Biomechanics University Medical Center Hamburg‐Eppendorf Hamburg Germany
4. Department of Orthopaedics and Rehabilitation Yale University School of Medicine New Haven CT USA
5. Department of Pediatrics Yale University School of Medicine New Haven CT USA
6. Department of Pediatrics University of Pennsylvania Perlman School of Medicine Philadelphia PA USA
7. Division of Endocrinology and Diabetes and Center for Bone Health The Children's Hospital of Philadelphia Philadelphia PA USA