aDepartment of Neurology, Johns Hopkins School of Medicine, Baltimore, MD, United States
bLawrence S. Bloomberg Faculty of Nursing, University of Toronto, Toronto, ON, Canada
cNewcastle Pain Management Unit, Royal Victoria Infirmary, Newcastle upon Tyne, United Kingdom
dCumming School of Medicine (Community Health Sciences), Faculty of Nursing, University of Calgary, Calgary, AB, Canada
eAnesthesiology & Pain Medicine, School of Medicine, Harborview Integrated Pain Care Program, University of Washington, Seattle, WA, United States
Sponsorships or competing interests that may be relevant to content are disclosed at the end of this article.
Received May 15, 2018
Accepted May 15, 2018