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Article History

Received: 29 August 2018

Accepted: 10 September 2019

First Online: 21 October 2019

Ethics approval and consent to participate

: The need for consent was waived by the local independent ethics committee (CPP Nord-Ouest IV, Lille, France), which decided that the study was non-interventional. People could oppose the collection of their data at the time of the interview or could ask the responsible of the data (Pr B. Decaudin) to remove their data from the data base at any time after the interview. Consequently, in line with French legislation, a formal approval was not required but there was a formal information, which gave the right to the people to access, modify or remove their data upon request. The study was registered with the French National Data Protection Commission (CNIL, Paris, France; reference: 1826665).

: Not applicable.

: The authors declare that they have no competing interests.