Funding for this research was provided by:
Université Paris Descartes
French Social Security Scheme for Liberal Professionals
Received: 25 April 2017
Accepted: 9 February 2018
First Online: 27 February 2018
Ethics approval and consent to participate
: This study was conducted according to guidelines laid down in the Declaration of Helsinki, and all procedures were approved by the Institutional Review Board of the French Institute for Health and Medical Research (IRB Inserm No. 0000388FWA00005831) and the French Data Protection Authority (Commission Nationale Informatique et Libertés No. 908450 and No. 909216). Electronic informed consent was obtained from all participants.
: The consent form is available upon request.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.