1. Clinic for Internal Medicine and Invasive Cardiology Carl von Ossietzky University Oldenburg Oldenburg Germany
2. Clinic for Gastroenterology Carl von Ossietzky University Oldenburg Oldenburg Germany
3. Clinic for Invasive Electrophysiology Cardiovascular Center Bad Neustadt Bad Neustadt a.d. Saale Germany
4. Department of Cardiology and Angiology Philipps‐University Marburg Marburg Germany