1 SPHERU/Department of Community Health and Epidemiology, University of Saskatchewan, Saskatoon, SK, Canada; sya277@mail.usask.ca.
2 SPHERU/Department of Geography and Planning, University of Saskatchewan, Saskatoon, SK, Canada.
3 Canadian Center for Health and Safety in Agriculture, Department of Medicine, College of Medicine, University of Saskatchewan, Saskatoon, SK, Canada.