[1] Univ British Columbia, Dept Psychiat, Vancouver, BC V5Z 1M9, Canada
[2] Univ Toronto, Dept Psychiat, Toronto, ON M5S 1A1, Canada
[3] Swinburne Univ Technol, Fac Life & Social Sci, Hawthorn, Vic 3122, Australia
[4] Univ British Columbia, Dept Occupat Sci & Occupat Therapy, Vancouver, BC V5Z 1M9, Canada
[5] Univ Calif Berkeley, Dept Psychol, Berkeley, CA 94720 USA
[6] Univ Toronto, Inst Med Sci, Toronto, ON M5S 1A1, Canada