[1] Univ Palermo, Dept Sci Hlth Promot & Mother Child Care G DAless, Palermo, Italy
[2] Univ Siena, Dept Publ Hlth, I-53100 Siena, Italy
[3] Univ Verona, Dept Med & Publ Hlth, I-37100 Verona, Italy
[4] Univ Modena & Reggio Emilia, Dept Publ Hlth Sci, Modena, Italy
[5] Univ Catanzaro Magna Graecia, Dept Hlth Sci, Catanzaro, Italy
[6] Univ Turin, Dept Publ Hlth & Microbiol, Turin, Italy
[7] Univ Bologna, Dept Med & Publ Hlth, Bologna, Italy
[8] Univ Sacred Heart Roma, Dept Publ Hlth, Rome, Italy
[9] Univ Parma, Dept Publ Hlth, I-43100 Parma, Italy
[10] Univ Messina, Dept Hyg Prevent Med & Publ Hlth, Messina, Italy
[11] Univ Aquila, Dept Internal Med & Publ Hlth, I-67100 Laquila, Italy
[12] Univ Catania, Dept Hyg & Publ Hlth GF Ingrassia, Catania, Italy
[13] Univ Brescia, Inst Hyg Epidemiol & Publ Hlth, Brescia, Italy
[14] Univ G DAnnunzio, Dept Med & Sci Aging, Chieti, Italy
[15] Univ Roma Tor Vergata, Dept Publ Hlth, Rome, Italy
[16] Univ Bari Aldo Moro, Dept Biomed Sci, Bari, Italy
[17] Univ Pavia, Dept Publ Hlth Neurosci Expt & Legal Med, I-27100 Pavia, Lombardi, Italy
[18] Univ Hosp Federico II Naples, Dept Publ Hlth, Naples, Italy