1. Diagnostic and Interventional Radiology, Dr. Hancken Clinic, 21680 Stade, Germany
2. Department of Radiology, Wesling Hospital Minden, University Hospital of the Ruhr University Bochum, 32429 Minden, Germany
3. 53 N Studios, 21682 Stade, Germany
4. Otorhinolaryngology, Head and Neck Surgery, Elbe Hospitals, 21680 Stade, Germany