[1] Leiden University Medical Center,Department of Internal Medicine, Division of Endocrinology, Center for Bone Quality
[2] Medical University of Vienna,Department for Pediatric Pulmonology, Allergology and Endocrinology, Comprehensive Center for Pediatrics
[3] Vienna Bone and Growth Center,Center of Expertise for Rare Disorders of Bone, Growth and Mineralization
[4] Erasmus University Medical Center,Department of Internal Medicine, Erasmus MC Bone Center
[5] Aarhus University Hospital,Department of Clinical Medicine; Department of Endocrinology and Internal Medicine