Axén, I.
Jensen, I.
Butler Forslund, E.
Grahn, B.
Jørgensen, V.
Opava, C. H.
Bodin, L.
Article History
Received: 25 November 2019
Accepted: 10 May 2020
First Online: 19 May 2020
Ethics approval and consent to participate
: All the studies had individual ethical permission from their local ethic committees; MC Chiro: 2007/1458–31/4, SCIP Falls: 2012/830–31/2, 2013/391–32, 2014/364–32, Work-Up: 2012/497, 2012/648, 2012/833, PARA: 2010/1232–31/1 and SPA: 2012/2200–31/5.In addition, ethical approval for this specific merge and analysis of data was granted by the Swedish Ethical Review Authority (2017/961–31/5) for the Swedish data and by the Regional Committees for Medical and Health Research Ethics in Norway (2012/531) for the Norwegian data.
: Not applicable.
: The authors declare they have no competing interests.