[1] Ctr Addict & Mental Hlth, London, ON N6G 4X8, Canada
[2] Univ Western Ontario, Dept Psychol, London, ON, Canada
[3] Curtin Univ Technol, Natl Drug Res Inst, Perth, WA, Australia
[4] Univ N Dakota, Sch Med & Hlth Sci, Dept Clin Neurosci, Grand Forks, ND 58201 USA
[5] Swiss Inst Prevent Alcohol & Drug Problems, Lausanne, Switzerland
[6] Univ Lausanne Hosp, Lausanne, Switzerland
[7] Ctr Addict & Mental Hlth, Toronto, ON, Canada