1Department of Clinical Medicine, University of Insubria, Varese, Italy
2Department of Medical Sciences, Clinica Medical and Vascular Diseases Center, University of Ferrara, Ferrara, Italy,
3Department of Medicine, Hospital of Ferrara, Ferrara, Italy,
4Department of Medicine, Hospital of Livorno, Livorno, Italy, and
5Division of Cardiovascular Medicine, Department of Medicine, University of Michigan Cardiovascular Center, Ann Arbor, MI, USA