1. Department of Geography and Planning, University of Toronto, 100 Saint George Street, Toronto, Ontario M5S 3G3, Canada.
2. Department of Geography, University of Toronto, Mississauga, 3359 Mississauga Road North, Mississauga, Ontario L5L 1C6, Canada.
3. Faculty of Kinesiology and Physical Education, University of Toronto, 55 Harbord Street, Toronto, Ontario M5S 2W6, Canada.