1. Department of Cardiology and Pneumonology; Charite-Universiätsmedizin Berlin, Campus Benjamin-Franklin; Hindenburgdamm 30 12220 Berlin Germany
2. Department of Pharmacology; Georgetown University Medical Center; Washington DC U.S.A.
3. Department of Cardiology; Leiden University Medical Center; Leiden The Netherlands
4. Department of Molecular and Cellular Pharmacology; University of Miami School of Medicine; Miami FL U.S.A.