Received: 2 November 2018
Accepted: 13 January 2019
First Online: 29 January 2019
Ethics approval and consent to participate
: Consent was obtained from all individuals and the protocol approved by the Ethical Board (ExternalRef removed: NCT03294980; CRB Brest, collection 2008–214), in accordance with the Declaration of Helsinki.
: Not applicable.
: The authors declare that they have no competing interests.
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