1. Division of Electrophysiology, Department of Cardiology, Klinikum Fuerth, Jakob-Henle-Str. 1, D-90766 Fuerth, Germany
2. Division of Electrophysiology, Department of Cardiology, Paracelsus Medical University Nuremberg, Breslauer Str. 201, D-90471 Nuremberg, Germany
3. Department of Gastroenterology and Endocrinology, Paracelsus Medical University Nuremberg, Breslauer Str. 201, D-90471 Nuremberg, Germany
4. Department of Internal Medicine, Kreiskrankenhaus St. Anna, Spitalstr. 5, D-91315 Hoechstadt a.d.Aisch, Germany