1. Clinic for Diagnostic and Interventional Radiology, University Hospital Heidelberg, Germany
2. Center of Orthopedics, Trauma and Spinal Cord Injury, University Hospital Heidelberg, Germany
3. Radiology (E010), German Cancer Research Center (DKFZ), Heidelberg, Germany
4. Department of Nursing and Health, University of Applied Sciences of the Saarland, Saarbrücken, Germany