1. Department of Anaesthesia and Pain Management, Toronto General Hospital, Toronto, Ontario, Canada
2. Transitional Pain Service, Department of Anaesthesia and Pain Management, Toronto General Hospital, Toronto, Ontario, Canada
3. Department of Anaesthesia, University of Toronto, Toronto, Ontario, Canada
4. University of Toronto Centre for the Study of Pain, University of Toronto, Toronto, Ontario, Canada
5. Department of Surgery, University of Toronto, Toronto, Ontario, Canada
6. Department of Pharmacy, North York General Hospital, Toronto, Ontario, Canada
7. Faculty of Nursing, University of Toronto, Toronto, Ontario, Canada
8. Department of Surgery, St. Michaels Hospital, Toronto, Ontario, Canada
9. Department of Anaesthesia, North York General Hospital, Toronto, Ontario, Canada
10. Department of Surgery, Mount Sinai Hospital, Toronto, Ontario, Canada