1. Department of Cardiovascular Medicine; Division of Electrophysiology; University Hospital of Muenster; Muenster Germany
2. Department of Neurology; University Hospital of Muenster; Muenster Germany
3. Physicians Centre at the Principal Market; Muenster Germany
4. Department of Neurology, Paracelsus-Klinik Osnabrueck; Osnabrueck Germany