1. 1Stem Cell Center, Lund University, Lund, Scania, Sweden.
2. 2Department of Clinical Sciences, Division of Neurosurgery, Lund University, Lund, Scania, Sweden.
3. 3Department of Clinical Sciences, Division of Neurology, Lund University, Lund, Scania, Sweden.
4. 4Department of Neurosurgery, Skåne University Hospital, Lund, Scania, Sweden.