1. Lazio Regional Health Service; Department of Epidemiology; Via di Santa Costanza, 53 Rome Italy 00198
2. Health District 8 (ASL 8) Cagliari; Social-Health Division; Via Logudoro 17 Cagliari Sardinia Italy 09127
3. Drug Abuse and Doping Unit, Istituto Superiore di Sanità; Department of Therapeutic Research and Medicines Evaluation; viale Regina Elena 299 Rome Italy 00161
4. Catholic University of the Sacred Heart; Institute of Psychiatry and Psychology; L.go A. Gemelli 8 Rome Italy 00168