1. Department of Community Health and Epidemiology, Queen's University, Kingston, ON, Canada
2. Department of Emergency Medicine, Queen's University, Kingston, ON, Canada
3. Canadian Centre for Health and Safety in Agriculture, University of Saskatchewan, Saskatoon, SK, Canada
4. Accident Research Centre, Monash University, Melbourne, VIC, Australia
5. National Children's Center for Rural and Agricultural Health and Safety, Marshfield Clinic Research Foundation, Marshfield, WI
6. Department of Community Health and Epidemiology, University of Saskatchewan, Saskatoon, SK, Canada
7. Department of Agricultural and Bioresource Engineering, University of Saskatchewan, Saskatoon, SK, Canada