1. Department of Medicine and Surgery, University of Insubria, Varese, Italy
2. Department of Medicine and Cardiopulmonary Rehabilitation, Maugeri Care and Research Institutes, IRCCS Tradate, Varese, Italy
3. Fondazione Umbra Cuore e Ipertensione-ONLUS and Division of Cardiology, Hospital S. Maria Della Misericordia, Perugia, Italy
4. Department of Medicine, University of Perugia, Perugia, Italy