1. School of Public Health, University of Alberta, Edmonton, AB T6G 1C9, Canada
2. Department of Geography and Environmental Studies, Wilfrid Laurier University, Waterloo, ON N2L 3C5, Canada
3. School of International Policy and Governance, Balsillie School of International Affairs, Waterloo, ON N2L 6C2, Canada
4. University of the Western Cape, Cape Town 7700, South Africa