1. Department of Health Promotion, Maternal and Infant Care, Internal Medicine and Excellence Specialist Medicine, University of Palermo, Palermo, Italy
2. Prevention and Epidemiology Unit, Ragusa Local Health Authority, Ragusa, Italy
3. Prevention and Epidemiology Unit, Agrigento Local Health Authority, Agrigento, Italy
4. Prevention and Epidemiology Unit, Trapani Local Health Authority, Trapani, Italy
5. Prevention and Epidemiology Unit, Palermo Local Health Authority, Palermo, Italy
6. Prevention and Epidemiology Unit, Catania Local Health Authority, Catania, Italy
7. Regional Epidemiological Observatory, Sicilian Health Department, Palermo, Italy