Combined Neurosurgery and Orthopaedic Spine Program, Division of Spine Surgery, University of British Columbia, Vancouver, British Columbia, Canada.
Address correspondence and reprint requests to Charles G. Fisher, MD, MHSc, University of British Columbia, Vancouver, BC Canada; E-mail: Charles.Fisher@vch.ca
Received 6 May, 2019
Accepted 7 May, 2019
The manuscript submitted does not contain information about medical device(s)/drug(s).
No funds were received in support of this work.
No relevant financial activities outside the submitted work.