1. School of Rural and Northern Health, Centre for Research in Occupational Safety and Health, Laurentian University, Sudbury, Canada;
2. Faculty of Science, McMaster University, Hamilton, Canada;
3. Center for Continuing Education, McMaster University, Hamilton, Canada;
4. Rady Faculty of Health Sciences, College of Rehabilitation Sciences, University of Manitoba, Winnipeg, Canada;
5. Special Education Department, Loretto College, Toronto, Canada