1. School of Nursing McMaster University, 1200 Main Street West, Hamilton, Ontario, Canada;
2. Department of Family Medicine
3. School of Nursing School of Geography, McMaster University, 1200 Main Street West, Hamilton, Ontario, Canada;
4. Department of Family Medicine School of Geography, McMaster University, 1200 Main Street West, Hamilton, Ontario, Canada;
5. School of Geography, McMaster University, 1200 Main Street West, Hamilton, Ontario, Canada;
6. University of Alberta, Canada.