1. School of Public Health, University of Alberta, Edmonton, AB T6G 1C9, Canada
2. Faculty of Rehabilitation Medicine, University of Alberta, Edmonton, AB T6G 2G4, Canada
3. Division of Preventive Medicine, Department of Medicine, University of Alberta, Edmonton, AB T6G 2R3, Canada
4. John W. Scott Health Sciences Library, University of Alberta, Edmonton, AB T6G 2R7, Canada
5. Faculty of Health Sciences, Ontario Tech University, Oshawa, ON L1H 7K4, Canada
6. School of Rehabilitation Sciences, University of Ottawa, Ottawa, ON K1H 8M5, Canada
7. EWI Works, Edmonton, AB T6E 3N8, Canada
8. Occupational Hygiene & Product Safety, Suncor Energy, Calgary, AB T2P 3E3, Canada
9. Department of Physical Therapy, University of Alberta, Edmonton, AB T6G 2G4, Canada