[1] Univ Toronto, Ctr Addict & Mental Hlth, Neurosci Res Dept, Neurogenet Sect, Toronto, ON, Canada
[2] Univ Toronto, Dept Psychiat, Toronto, ON, Canada
[3] Univ Toronto, Inst Med Sci, Toronto, ON, Canada
[4] Dalhousie Univ, Dept Psychiat, Halifax, NS, Canada
[5] Dalhousie Univ, Dept Pharmacol, Halifax, NS B3H 4H7, Canada
[6] Univ Cagliari, Dept Publ Hlth Clin & Mol Med, Cagliari, Italy