1. Clinical and Interventional Cardiology Sassari University Hospital Via Enrico De Nicola Sassari 07100 Italy
2. Cardiovascular Department, Centre for Diagnosis and Management of Cardiomyopathies, Azienda Sanitaria Universitaria Integrata di Trieste (ASUITS) University of Trieste Trieste Italy
3. Department of Medical, Surgical and Experimental Sciences University of Sassari Italy