1 Department of Clinical and Experimental Medicine, Cardiology Unit. Outpatient Heart failure, Cardiomyopathy and Vascular Lab. University Hospital of Messina, Via Consolare Valeria, Messina 98125, Italy.
2 University of Palermo, Adjunct Professor of Cardiology, Postgraduate Medical School of Cardiology, Palermo 90127, Italy.
3 Department of Internal Medicine, Division of Cardiology, University of Patras Medical School, Patras 26221, Greece.
4 Department of Cardiology, Mater Misericordiae University Hospital, University College of Dublin, School of Medicine, Dublin D07R2WY, Ireland.
5 Department of Medicine, University of Arkansas for Medical Sciences and the Veterans Affairs Medical Center, Little Rock, AR 72205, USA.