Received: 17 July 2020
Accepted: 1 December 2020
First Online: 11 December 2020
Ethics approval and consent to participate
: The creation and analysis of the two cohorts was approved by the regional ethics committee of Nord-Pas-De-Calais, France (2011-A00990-41 and 2011-A01598-33). All subjects gave written, informed consent prior to enrolment.
: Not applicable.
: The authors declare that they have no competing interests.