1. Division of Medical Physics, Department of Diagnostic and Interventional Radiology Medical Center – University of Freiburg, Faculty of Medicine, University of Freiburg Freiburg Germany
2. Department of Diagnostic and Interventional Radiology Medical Center – University of Freiburg, Faculty of Medicine, University of Freiburg Freiburg Germany
3. Department of Orthopedic and Trauma Surgery Medical Center – University of Freiburg, Faculty of Medicine, University of Freiburg Freiburg Germany
4. Department of Stereotactic and Functional Neurosurgery Medical Center – University of Freiburg, Faculty of Medicine, University of Freiburg Freiburg Germany
5. Department of Orthopaedic Surgery Odense University Hospital Odense Denmark