1. Cardiology Division, University Hospitals, Geneva, Switzerland (M.R.).
2. Interventional Cardiology, Cardiovascular Department, Papa Giovanni Hospital, Bergamo, Italy (G.G.).
3. Centro Nacional de Investigaciones Caridovasculares Carlos III (CNIC), Madrid, Spain (B.I.).
4. Department of Cardiology, IIS-Fundación Jiménez Díaz Hospital, Madrid, Spain (B.I.).
5. CIBERCV, Madrid, Spain (B.I.).