1. Epidemiological Research Unit; Institute for Clinical Psychology and Psychotherapy; Technische Universität Dresden; Dresden Germany
2. Chemisches und Veterinäruntersuchungsamt (CVUA); Karlsruhe Germany
3. Ministry of Rural Affairs and Consumer Protection; Stuttgart Germany
4. Independent researcher; Toronto Canada
5. Centre for Addiction and Mental Health (CAMH); Toronto Ontario Canada
6. Dalla Lana School of Public Health; University of Toronto; Toronto Ontario Canada