1. Department of Diagnostic, Interventional and Pediatric Radiology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
2. Department of Orthopedic Surgery and Traumatology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
3. Department of Orthopedic Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
4. Department of Orthopedic Surgery and Traumatology, Fribourg Cantonal Hospital, University of Fribourg, Fribourg, Switzerland