1. Institute for Pathophysiology, West German Heart and Vascular Center, University of Essen Medical School , Hufelandstr. 55, 45147 Essen , Germany
2. Department of Cardiology, Aarhus University Hospital , Palle Juul-Jensen Blvd. 99, 8200 Aarhus N , Denmark
3. Institute of Clinical Medicine, Aarhus University , Palle Juul-Jensen Blvd. 82, 8200 Aarhus N , Denmark
4. Department of Pharmacology and Pharmacotherapy, Semmelweis University , Nagyvárad tér 4, 1089 Budapest , Hungary
5. Pharmahungary Group , Hajnoczy u 6, 6722 Szeged , Hungary
6. Institute of Physiology, Justus-Liebig-Universität , 35392 Giessen , Germany