1. Department of Cardiology, Hospital Universitario de La Princesa, Instituto de Investigación Sanitaria IIS-IP, Universidad Autónoma de Madrid, CIBER-CV , C/Diego de León 62, Madrid 28006 , Spain
2. Department of Cardiovascular Medicine, Fondazione Policlinico Universitario A. Gemelli IRCCS , Rome , Italy
3. Department of Cardiovascular and Pulmonary Sciences, Catholic University of the Sacred Heart , Rome , Italy