1. Department of Internal Medicine, General Hospital Oberndorf Teaching Hospital of the Paracelsus Medical University Salzburg Austria
2. Division of Gastroenterology and Hepatology, Department of Medicine III Medical University of Vienna Vienna Austria
3. Institute of general practice, family medicine and preventive medicine Paracelsus Medical University Salzburg Austria
4. Clinic I for Internal Medicine, University Hospital Salzburg Paracelsus Medical University Salzburg Austria
5. Department of Cardiology University Hospital Zurich Zurich Switzerland