Funding for this research was provided by:
Institut Franco Européen de Chiropraxie (IFEC), FRANCE
Text and Data Mining valid from 2018-04-19
Received: 12 October 2017
Accepted: 15 February 2018
First Online: 19 April 2018
Ethics approval and consent to participate
: Not applicable
: All authors consented to publication.
: All authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.