1 Department of Internal Medicine III, Gastroenterology, Metabolic Diseases and Intensive Care, University Hospital RWTH Aachen, Aachen, Germany.
2 Department of Internal Medicine B, Cardiology, University Medicine Greifswald, Greifswald, Germany; DZHK (German Center for Cardiovascular Research), Partner Site Greifswald, Germany.
3 Department of Internal Medicine III, Gastroenterology, Metabolic Diseases and Intensive Care, University Hospital RWTH Aachen, Aachen, Germany. Electronic address: pstrnad@ukaachen.de.