1. University of Milano-Bicocca, Milan, Italy (G.M., G.G.).
2. Department of Cardiology, University of Oslo, Ullevaal Hospital, Norway (S.E.K.).
3. Charité – Universitätsmedizin Berlin, Institute of Clinical Pharmacology and Toxicology, Germany (R.K.).
4. Department of Cardiology, Centre Hospitalier Princesse Grace, Monte Carlo, Monaco (A.P.).
5. Human Neurotransmitters Laboratory, Baker Heart and Diabetes Institute, and Monash University, Melbourne, Australia (M.E.).