1. Department of Clinical and Experimental Medicine, Section of Cardiology, University of Messina, Messina, Italy
2. Department of Clinical and Experimental Medicine, Section of Dermatology, University of Messina, Messina, Italy
3. Department of Clinical and Experimental Medicine, University of Catania, Catania, Italy
4. Second Department of Propaedeutic Internal Medicine, Medical School, Aristotle University of Thessaloniki, Hippokration Hospital, Thessaloniki, Greece