1. Molecular and Clinical Sciences Research Institute, St George’s, University of London, United Kingdom (J.-C.K).
2. Institute of Cardiology, Catholic University, Rome, Italy (F.C.).
3. Department of Cardiovascular Diseases, Mayo Clinic College of Medicine, Rochester, MN (B.J.G.).
4. Vita-Salute University and Department of Cardiology San Raffaele Hospital, Milan, Italy (P.G.C.).