1. Department of Infectious Diseases, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Melbourne, VIC 3010, Australia
2. Psychology Department, York University, Toronto, ON M3J 1P3, Canada
3. National Association of Friendship Centres, Ottawa, ON K2P 0L9, Canada
4. Dalla Lana School of Public Health, University of Toronto, Toronto, ON M5T 3M7, Canada
5. Well Living House, and Department of Family and Community Medicine, St. Michael’s Hospital, Toronto, ON M5B 1W8, Canada