1. Department of Medicine and Surgery , University of Insubria , Varese , Italy
2. Department of Medicine and Cardiopulmonary Rehabilitation , Maugeri Care and Research Institute, IRCCS Tradate , Tradate , Italy
3. Department of Medicine, and Centro di Ricerca Clinica e Traslazionale (CERICLET) , University of Perugia , Perugia , Italy
4. Fondazione Umbra Cuore e Ipertensione-ONLUS and Division of Cardiology, Hospital S. Maria della Misericordia , Perugia , Italy