Funding for this research was provided by:
French Minsitry of Health
French Ministry of the Environment
French Civil Aviation Authority
Received: 25 June 2020
Accepted: 27 December 2020
First Online: 10 January 2021
Ethics approval and consent to participate
: Two national authorities in France, the French Advisory Committee for Data Processing in Health Research (CCTIRS 11–405) and the French National Commission for Data Protection and the Liberties approved the present study (DR 2012–361).The participants signed and returned an informed consent by mail.
: Not applicable.
: The authors declare that they have no competing interests.