1. Department of Paediatric Orthopaedics, Children’s University Hospital Basel (UKBB), Spitalstrasse 33, 4056, Basel Switzerland
2. Department of Paediatric Orthopaedics, University Hospital Geneva, Geneva Switzerland
3. Orthopädie Zentrum Zürich (OZZ), Zurich Switzerland
4. Institute Universitaire de Pathologie, Lausanne Switzerland
5. Institute of Pathology Enge, Zurich Switzerland
6. Institute of Pathology, University Hospital Basel, Basel Switzerland