1 Department of Neurosurgery, Neurocenter and Regenerative Neuroscience Cluster, University Hospital Bern, Switzerland University of Bern, Inselspital, Berne, Switzerland ; Graduate School for Cellular and Biomedical Sciences, University of Bern, Bern, Switzerland.
2 Department of Neurosurgery, Neurocenter and Regenerative Neuroscience Cluster, University Hospital Bern, Switzerland University of Bern, Inselspital, Berne, Switzerland.