1. Departments of Anesthesiology and Surgery, Queens University, Kingston General Hospital, Kingston, Ontario, Canada
2. School of Nursing, University of Ottawa, Ottawa, Ontario, Canada
3. Department of Anaesthesia, College of Physicians & Surgeons of Manitoba, Winnipeg, Manitoba, Canada
4. Acute Pain Management Services, Queens University, Kingston General Hospital, Kingston, Ontario, Canada
5. Department of Anaesthesia, Ottawa Hospital Civic Campus, Ottawa, Ontario, Canada
6. Department of Anaesthesia, Queen Elizabeth II Health Sciences Centre, Victoria General Site, Halifax, Nova Scotia, Canada
7. Departments of Anesthesiology & Community Health and Epidemiology, School of Nursing, Queens University, Kingston, Ontario, Canada