Department of Psychology, Ryerson University, Toronto, ON M5B 2K3, Canada. Department of Psychiatry, University of Toronto, Toronto, ON M5T 1R8, Canada. Centre for Mental Health, University Health Network, Toronto, ON M5T 2S8, Canada. Bariatric Surgery Program, Toronto Western Hospital, Toronto, ON M5T 2S8, Canada. Division of General Surgery, University Health Network, University of Toronto, Toronto, ON M5T 2S8, Canada. Centre for Addiction and Mental Health, Toronto, ON M5S 2S1, Canada.