[1] York Univ, Fac Hlth, Dept Psychol, Toronto, ON M3J 1P3, Canada
[2] Dalhousie Univ, Fac Med, Dept Community Hlth & Epidemiol, Halifax, NS B3H 4R2, Canada
[3] SickKids Hosp, Toronto, ON M5G 1X8, Canada
[4] Dalhousie Univ, Fac Sci, Dept Psychol & Neurosci, Halifax, NS B3H 4J1, Canada