1. Department of Radiology, Orthopedic University Hospital Balgrist, Forchstrasse 340, CH-8008 Zurich, Switzerland.
2. University of Zurich, Faculty of Medicine, Zurich, Switzerland.
3. Department of Physiotherapy, Orthopedic University Hospital Balgrist, Zurich, Switzerland.
4. Department of Orthopedic Research, Orthopedic University Hospital Balgrist, Zurich, Switzerland.