1. Division of Cardiology, Hospital S. Maria della Misericordia, and Fondazione Umbra Cuore e Ipertensione-ONLUS, Perugia, Italy (P.V.).
2. Department of Medicine, and Centro di Ricerca Clinica e Traslazionale (CERICLET), University of Perugia, Italy (G.R.).
3. Department of Medicine and Surgery, University of Insubria, Varese, Italy (F.A.).
4. Department of Medicine and Cardiopulmonary Rehabilitation, Istituti Clinici Scientifici Maugeri IRCCS, Tradate, Italy (F.A.).