1 School of Nursing and Department of Epidemiology and Community Medicine, University of Ottawa, and Clinical Epidemiology Program, Ottawa Health Research Institute, Ottawa
2 School of Nursing, University of Ottawa, Ottawa
3 School of Nursing, Queen's University, Kingston
4 Faculty of Medicine, University of Toronto, Toronto
5 Clinical Epidemiology Program, Ottawa Health Research Institute, Ottawa
6 Clinical Epidemiology Program, Ottawa Health Research Institute, Ottawa, Ontario, Canada
Email: igraham<@ohri.ca
Ottawa Hospital, ASB room 2–008, 1053 Carling Avenue, Ottawa, Ontario, Canada K1Y 4E9