Funding for this research was provided by:
Mutuelle Générale de l'Education Nationale
Ligue Contre le Cancer
marie curie international
Received: 2 December 2016
Accepted: 29 January 2018
First Online: 9 February 2018
Ethics approval and consent to participate
: All of the subjects signed an informed consent form at study entry, and the study protocol was approved by the French National Commission for Computed Data and Individual Freedom. E3N was approved by this French Commission for Data Protection and Privacy.
: Not applicable.
: The authors declare that they have no competing interests.
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