1. Institute of Human Genetics, Center for Molecular Medicine Cologne, Institute for Genetics, and Center for Rare Diseases Cologne, University of Cologne, Cologne, Germany
2. Institute of Biomechanics & Orthopaedics, German Sport University Cologne, Cologne Center for Musculoskeletal Biomechanics, University of Cologne, Cologne, Germany
3. Endocrine Research Unit, Medical Clinic and Policlinic IV, Hospital of the University of Munich, Munich, Germany
4. Orthopaedic University Hospital Friedrichsheim, Frankfurt am Main, Germany