Received: 6 July 2019
Accepted: 19 May 2020
First Online: 5 June 2020
Ethics approval and consent to participate
: The data collection process was reported to the Commission Nationale Informatique et Liberté (French Data Protection Authority) on 26/01/2018, under number 2146344v0. No formal consent was necessary to participate in the study.
: Not applicable.
: The authors declare that they have no competing interests.