*University of Ottawa Spine Program, The Ottawa Hospital
§Faculty of Medicine, University of Ottawa
Divisions of †Neurosurgery
∥Orthopaedic Surgery, The Ottawa Hospital
‡Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, ON, Canada
Supplemental Digital Content is available for this article. Direct URL citations appear in the printed text and are provided in the HTML and PDF versions of this article on the journal's Website, www.clinicalpain.com.
C.-A.D. received funding from Human Resources and Skills Development Canada, Ottawa, ON, Canada; via a 2013 Canada Summer Job. D.M.R. is currently receiving consulting fees from Palladian Health. The remaining authors declare no conflict of interest.
Reprints: Eugene K. Wai, MD, J-141, Division of Orthopaedic Surgery, The Ottawa Hospital, 1053 Carling Avenue, Ottawa, ON, Canada K1Y 4E9 (e-mail: [email protected]).
Received September 4, 2014
Received in revised form February 19, 2015
Accepted January 19, 2015