[1] Univ Pisa, Dept Biol, Via S Zeno 35, I-56127 Pisa, Italy
[2] Catania Univ, Dept Med Surg Sci & Adv Technol GF Ingrassia, Via Santa Sofia 87, I-95123 Catania, Italy
[3] Univ Sassari, Dept Med Surg & Expt Sci, Via Padre Manzella 4, I-07100 Sassari, Italy
[4] Univ Florence, Dept Hlth Sci, Viale Morgagni 48, I-50134 Florence, Italy
[5] AZIENDA ULSS 6 EUGANEA, Serv Prevenz Igiene & Sicurezza Ambienti Lavoro S, Via Osped 22, I-35131 Padua, Italy
[6] Univ Bari Aldo Moro, Dept Biomed Sci & Human Oncol, Piazza G Cesare 11, I-70124 Bari, Italy
[7] Univ Salento, Dept Biol & Environm Sci & Technol, Lab Hyg, I-73100 Lecce, Italy
[8] G dAnnunzio Univ Chieti Pescara, Dept Pharm, Via Vestini 31, I-66100 Chieti, Italy
[9] Univ Messina, Policlin Univ G Martino, Dept Biomed & Dent Sci & Morphofunct Imaging, Via Consolare Valeria 1, I-98100 Messina, Italy
[10] Univ Camerino, Sch Med & Hlth Prod Sci, Via Madonna Carceri 9, I-62032 Camerino, Italy
[11] Univ Genoa, Sch Med, Dept Expt Med, Via Antonio Pastore 1, I-16132 Genoa, Italy
[12] IRCCS Osped Polidin San Martino, Largo Rosanna Benzi 10, I-16132 Genoa, Italy
[13] Univ Naples Federico II, Dept Biol, Via Cinthia 21, I-80126 Naples, Italy
[14] Catania Univ, Specializat Sch Hyg & Prevent Med, Dept Med Surg Sci & Adv Technol GF Ingrassia, Via Santa Sofia 87, I-95123 Catania, Italy
[15] Univ Torino, Dept Publ Hlth & Pediat, Piazza Polonia 94, I-10126 Turin, Italy
[16] Univ Milan, Dept Biomed Surg & Dent Sci, Via Carlo Pascal 36, I-20133 Milan, Italy
[17] Univ Modena & Reggio Emilia, Dept Biomed Metab & Neural Sci, Sect Publ Hlth, Via Giuseppe Campi 287, I-41125 Modena, Italy
[18] Boston Univ, Dept Epidemiol, Sch Publ Hlth, Boston, MA 02118 USA