Department of Anesthesiology, University Hospital, Ghent, Belgium. Policlinico "Umberto I," University "La Sapienza", Rome, Italy. Aristotle University of Thessaloniki, Thessaloniki, Greece. Cardiology, Rigshospitalet, Copenhagen, Denmark. Cardiology Clinic, HUS Meilahti Hospital, Helsinki, Finland. Cardiology, Sahlgrenska University Hospital, Gothenburg, Sweden. Critical Care Proprietary Products Division, Orion Pharma, P.O. Box 65, FIN-02101, Espoo, Finland. Department of Cardiology S7, Jorvi Hospital, Espoo, Finland. Myokardiale Energetik und Metabolismus Research Unit, Medical University, Graz, Austria. Niguarda Ca'Granda Hospital, Milan, Italy. Division of Clinical Physiology, Department of Cardiology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary. Second University Cardiology Clinic, Attiko Teaching Hospital, Athens, Greece. Critical Care Proprietary Products Division, Orion Pharma, P.O. Box 65, FIN-02101, Espoo, Finland. piero.pollesello@gmail.com. Universitätsklinik für Innere Medizin III Innsbruck, Medizinsche Universität, Innsbruck, Austria. Berlin Center for Regenerative Therapies (BCRT), Campus Virchow Klinikum (CVK), Berlin, Germany.