Received: 13 April 2020
Accepted: 22 April 2020
First Online: 11 May 2020
Ethics approval and consent to participate
: Approval for this project was provided by the University of Alberta Human Research Ethics Board (Pro00099878).
: Not applicable.
: GNK reports active research grants unrelated to this work from The Natural Sciences and Engineering Research, The National Institutes of Health, The Alberta Spine Foundation, The American Orthotic and Prosthetic Association, The New Frontiers in Research Fund and the Canadian Chiropractic Research Foundation. Travel expenditures unrelated to this work in the past year include Kiropraktik i Sverige Live, Et liv i bevegelse" (ELIB), the Nordic Institute of Chiropractic and Clinical Biomechanics, The American Chiropractic Association, The National Institutes of Health, The British Columbia Chiropractic Association, and The World Federation of Chiropractic. He is the Chair of the World Federation of Chiropractic Research Council. Fees for medical-legal expertise unrelated to this work from the Canadian Chiropractic Protective Association. JH reports that he holds multiple research grants from Danish and international funding agencies and charities. He has received coverage of travel expenditures from multiple sources internationally in connection with speaking engagements. Within the past year he has received speaking fees from Parker Seminars and Novartis. He is a member of the World Federation of Chiropractic Research Council. SI has no declarations. JKS declares that he has no conflict of interest related to the subject matter or materials discussed in this manuscript. BG has no declarations.