1. University of Piemonte Orientale A. Avogadro; Department of Medical Sciences; Via Santena 5 bis Novara Italy 28100
2. ASL 5 - Grugliasco; Osservatorio Epidemiologico Dipendenze; Via Sabaudia 164 Grugliasco TO Italy 10095
3. University of Torino; Department of Public Health; Via Santena 5bis Turin Italy 10126
4. University of Torino; Department of Public Health; Via santena 5bis Torino Italy 10126