1. Department of Epidemiology; Lazio Regional Health Service; Rome Italy
2. Department of Public Health, School of Population and Public Health; University of British Columbia; Vancouver Canada
3. School of Health Sciences; Central Michigan University; Mount Pleasant Michigan USA
4. MPH Program, School of Public Health; Central Michigan University; Michigan USA
5. CPO Piemonte, Dipartimento Interaziendale di Prevenzione Secondaria dei Tumori S.C. Epidemiologia dei Tumori; AO Città della Salute e della Scienza di Torino Via San Francesco da Paola 31; Torino Italy
6. Best practices, knowledge exchange and economic issues; European Monitoring Centre for Drugs and Drug Addiction; Lisbon Portugal