1. Centro Cardiologico Monzino, I.R.C.C.S, Via Parea 4, 20138 Milan, Italy
2. Department of Cardiovascular & Thoracic Sciences, Fondazione Policlinico Universitario A. Gemelli, I.R.C.C.S, Rome, Italy
3. Università Cattolica del Sacro Cuore, Rome, Italy
4. Department of Clinical Sciences and Community Health – Cardiovascular Section, Università degli Studi di Milano, Milan, Italy