1 Institute of Pharmacology, West German Heart and Vascular Center, University Duisburg-Essen, Duisburg, Germany.
2 Department of Gastroenterology, Hepatology and Infectious disease, Faculty of Medicine & Düsseldorf University Hospital, Heinrich-Heine-University, Düsseldorf, Germany.
3 Department of Thoracic and Cardiovascular Surgery, University Hospital Essen, Essen, Germany.
4 Department of Medicine and Research Center, Montreal Heart Institute and Université de Montréal, Montréal, Canada.
5 Department of Integrative Physiology, Baylor College of Medicine, Houston, TX, USA.
6 Institute of Pharmacology, West German Heart and Vascular Center, University Duisburg-Essen, Duisburg, Germany. anke.fender@uk-essen.de.