1. Department of Neurology University Medical Center Goettingen Goettingen Germany
2. Paracelsus‐Elena‐Klinik Kassel Germany
3. Department of Cardiology University Medical Center Goettingen Goettingen Germany
4. Department of Clinical Chemistry University Medical Center Goettingen Goettingen Germany
5. Department of Neurology Philipps‐University Marburg Germany
6. Department of Neurosurgery University Medical Center Goettingen Goettingen Germany