1. Children’s and Adolescent’s Hospital, University of Cologne, Cologne, Germany
2. Cologne Center for Musculoskeletal Biomechanics (CCMB), University of Cologne, Cologne, Germany
3. Centre of Prevention and Rehabilitation, University of Cologne, Cologne, Germany
4. Cologne Center for Molecular Medicine, Children’s and Adolescent’s Hospital, University of Cologne, Cologne, Germany
5. Institute of Medical Statistics and Computational Biology, University of Cologne, Cologne, Germany
6. Centre for Rare Skeletal Diseases in Childhood, University of Cologne, Cologne Germany