1. Department of Pediatrics, and Adolescent Medicine, Faculty of Medicine and University Hospital of Cologne, University of Cologne, Cologne, Germany
2. Center for Biochemistry, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
3. Center for Pediatric Pathology at the University Hospital Cologne, Cologne, Germany
4. Center for Molecular Medicine Cologne (CMMC), University of Cologne, Cologne, Germany
5. Cologne Center for Musculoskeletal Biomechanics (CCMB), Cologne, Germany