1 Amy S. Katz is with the Centre for Urban Health Solutions, St. Michael's Hospital, Toronto, Ontario, Canada. Patricia O'Campo is with the Li Ka Shing Knowledge Institute, St. Michael's Hospital, and the Dalla Lana School of Public Health, University of Toronto. Benjamin Brisbois is with the Dalla Lana School of Public Health, University of Toronto. Suzanne Zerger is with the Provincial System Support Program, Centre for Addictions and Mental Health, Toronto. Stephen W. Hwang is with the Centre for Urban Health Solutions, St. Michael's Hospital, and the Division of General Internal Medicine, Department of Medicine, University of Toronto.