1. Institute of Radiology and Nuclear Medicine, Cantonal Hospital Winterthur, 8401 Winterthur, Switzerland
2. Clinic of Urology, Cantonal Hospital Winterthur, 8401 Winterthur, Switzerland
3. Department of Neuroradiology, Clinical Neuroscience Center, University Hospital Zurich, 8091 Zurich, Switzerland
4. Medical Faculty, University of Zurich, 8032 Zurich, Switzerland
5. Medical Faculty, University of Basel, 4056 Basel, Switzerland