Received: 23 June 2020
Accepted: 7 September 2020
First Online: 21 September 2020
Ethics approval and consent to participate
: Our work fitted a standard methodology (MR004) as defined by the french <i>Comité National Informatique et Liberté</i> (CNIL), and the study’s data collection procedures were registered with and validated by our University Medical Center’s Data Protection Officer (reference: DEC19–084). Since our work was non-interventional and retrospective, no further specific ethics approval was needed.
: Not applicable.
: The authors declare that they have no competing interests.