1. Department of Neuroradiology, University of Ulm, Lindenallee 2, 89312 Günzburg, Germany
2. Department of Neurosurgery, University of Ulm, Lindenallee 2, 89312 Günzburg, Germany
3. Endocrinological Center Ulm, Weinberg 41, 89075 Ulm, Germany
4. Department of Otorhinolaryngology, University of Ulm, Frauensteige 12, 89075 Ulm, Germany