1. Division of Cardiology, Fondazione IRCCS; Policlinico San Matteo; Piazza Golgi 1 27100 Pavia Italy
2. Heart Failure Unit and Cardiopulmonary Laboratory, Cardiology, IRCCS; Policlinico San Donato University Hospital; Milano Italy
3. Cardiologia, Ospedale Santo Spirito; Roma Italy
4. Biometry & Statistics, Fondazione IRCCS; Policlinico San Matteo; Pavia Italy
5. Cardiology Unit, Department for the Treatment and Study of Cardiothoracic Diseases and Cardiothoracic Transplantation; IRCCS-ISMETT; Palermo Italy
6. Division of Cardiology; University of Perugia, School of Medicine; Perugia Italy
7. Division of Cardiology, Fondazione Salvatore Maugeri; IRCCS; Veruno Italy
8. Department of Biomedical and Surgical Sciences, Cardiology Section; University of Verona; Verona Italy
9. Department of Cardiology; Spedali Civili Hospital and University of Brescia; Italy
10. Division of Cardiology, Fondazione Salvatore Maugeri; IRCCS; Montescano Italy
11. Cardiology and Emergency Department; San Antonio Hospital; San Daniele del Friuli Italy
12. Cardiac, Thoracic and Vascular Department; University of Pisa; Pisa, Italy