1. Department of Clinical Sciences and Community Health; Università Degli Studi Di Milano; Milan Italy
2. Department of Epidemiology; IRCCS-Istituto Di Ricerche Farmacologiche ‘Mario Negri’; Milan Italy
3. Social and Epidemiological Research Department; Centre for Addiction and Mental Health; Toronto Canada
4. Dalla Lana School of Public Health; University of Toronto; Toronto Canada
5. Institute of Medical Science, University of Toronto; Toronto Canada
6. Epidemiological Research Unit; Klinische Psychologie & Psychotherapie, Technische Universität Dresden; Dresden Germany
7. Department of Epidemiology; the Maria Skłodowska-Curie Memorial Cancer Center and Institute of Oncology; Warsaw Poland
8. Department of Family & Preventive Medicine and Huntsman Cancer Institute; University of Utah School of Medicine; Salt Lake City Utah
9. Icahn School of Medicine at Mount Sinai; The Tisch Cancer Institute and Institute of Translational Epidemiology; New York NY