Received: 29 March 2019
Accepted: 21 August 2019
First Online: 6 September 2019
Ethics approval and consent to participate
: This research was approved by the National Commission for Information and Freedoms (Commission Nationale de l’Informatique et des Libertés, CNIL: 1955704) and by the Paoli-Calmettes Institute review board (COS: IPC 2016–009).
: Not applicable
: The authors declare that they have no competing interests.