Department of Geography, Environment and Spatial Sciences, Michigan State University, 673 Auditorium Road, East Lansing, MI, 48824, USA. apearson@msu.edu. Department of Kinesiology, Michigan State University, 27R Intramural Rec Sports- Circle, 308 West Circle Drive, East Lansing, MI, 48824, USA. Department of Epidemiology and Biostatistics, Michigan State University, 909 Wilson Road, Room B601, East Lansing, MI, 48824, USA. Department of Anthropology, Northwestern University, 1810 Hinman Ave, Evanston, IL, 60208, USA. Department of Biology, Carleton University, 209 Nesbitt Biology Building, Ottawa, ON, K1S 5B6, Canada. Centre for Public Health, Queen's University Belfast, University Road, Belfast, BT7 1NN, Northern Ireland, UK. Department of Geography, Environment and Spatial Sciences, Michigan State University, 673 Auditorium Road, East Lansing, MI, 48824, USA.