1. Department of Neurosurgery University Hospital Knappschaftskrankenhaus Bochum Ruhr‐University Bochum Bochum Germany
2. Department of General, Visceral and Transplant Surgery University Hospital Knappschaftskrankenhaus Bochum Ruhr‐University Bochum Bochum Germany
3. Center for Peripheral Nerve Surgery Dossenheim‐Heidelberg Germany