1. PhD Candidate in Medical Toxicology Institute of Pharmacology School of Medicine University of Messina Piazza XX Settembre 4 98122 Messina, Italy FAX 39/90-661029
2. PhD Candidate in Clinical Pharmacology Institute of Pharmacology School of Medicine University of Messina
3. Professor of Pharmacology Institute of Pharmacology School of Medicine University of Messina
4. Professor of Internal Medicine Department of Medicine School of Medicine University of Palermo Palermo, Italy