1. Peripheral Nerve Surgery Unit, Department of Neurosurgery, University of Ulm, Lindenallee 2, 89312 Günzburg, Germany
2. Department of Neurosurgery, University of Ulm, Lindenallee 2, 89312 Günzburg, Germany
3. Department of Neuroradiology, University of Ulm, Lindenallee 2, 89312 Günzburg, Germany