1. Orthopedic Surgery, Ruhr University Bochum, Bochum, Germany
2. Pediatric radiology, University Hospitals Giessen and Marburg Campus Giessen, Giessen, Germany
3. Orthopedic surgery, Arcus clinic, Pforzheim, Germany
4. Pediatric surgery, Kassel Hospital, Kassel, Germany
5. Department radiology, University of Rostock, Rostock, Germany
6. Hand surgery, Hand Surgery Seefeld, Seefeld, Zurich, Switzerland
7. Pediatric radiology, Kiel University, Kiel, Germany
8. Orthopedic surgery, Privat practice, Hamburg, Germany
9. Obstetrics, Gynecology and Reproductive Biology, Hannover Medical School, Hannover, Germany