1. Department of Orthopedic Surgery and Traumatology, Freiburg University Hospital, Albert Ludwigs University of Freiburg, Freiburg, Germany.
2. Fraunhofer Institute for Digital Medicine MEVIS, Bremen, Germany.
3. Division of Medical Physics, Department of Diagnostic and Interventional Radiology, Medical Center–University of Freiburg, Faculty of Medicine, Albert Ludwigs University of Freiburg, Freiburg, Germany.
4. Department of Orthopedic Surgery, University Hospital Odense, Odense, Denmark.