1. Department of Neurosurgery with Pediatric Neurosurgery; Charité-University Medicine, Campus Virchow; Berlin Germany
2. Center for Clinical Research and Management Education; Division of Health Care Sciences; Dresden International University; Dresden Germany
3. Department for General, Visceral and Transplantation Surgery; Charité-University Medicine, Campus Virchow; Berlin Germany
4. Department of Clinical Pathobiochemistry; Medical Faculty Carl Gustav Carus Technische Universität Dresden; Dresden Germany
5. Paul-Langerhans Institute Dresden; German Center for Diabetes Research; Dresden Germany
6. Department of Neurology; University Hospital Carl Gustav Carus Technische Universität Dresden; Dresden Germany
7. Department of Neurology; Beth Israel Deaconess Medical Center; Harvard Medical School; Boston Massachusetts USA