1. Cardiovascular Department; ASST Papa Giovanni XXIII Hospital; Bergamo Italy
2. Division of Cardiovascular Diseases, Mayo Clinic; Rochester MN USA
3. Department of Cardiology; Villa Bianca Hospital; Trento Italy
4. CNR Institute of Clinical Physiology, Cardio-Thoracic and Vascular Department; Niguarda Hospital; Milan Italy
5. Department of Cardiovascular, Neural and Metabolic Sciences, S. Luca Hospital, Istituto Auxologico Italiano, IRCCS, Milan, Italy; Department of Health Sciences; University of Milano-Bicocca; Milan Italy
6. FROM Research Foundation; ASST Papa Giovanni XXIII Hospital; Bergamo Italy