1. Center for Bone Quality; Leiden University Medical Center; Leiden The Netherlands
2. Department of Orthopaedic Surgery; Leiden University Medical Center; Leiden The Netherlands
3. Department of Medicine; Division of Endocrinology; Leiden University Medical Center; Leiden The Netherlands
4. Department of Medical Statistics and Bioinformatics; Leiden University Medical Center; Leiden The Netherlands
5. Mathematical Institute; Leiden University; Leiden The Netherlands