Funding for this research was provided by:
Ministère des Affaires Sociales et de la Santé
Received: 2 September 2017
Accepted: 11 January 2018
First Online: 22 February 2018
Ethics approval and consent to participate
: The protocol has been approved by CPP Nord-Ouest IV on 2012 (A00473 40) with 11 approved modifications (in particular for recruitment of new centers). The last version of the protocol was approved on 23 may 2017. All patients and caregivers have to give their consent before inclusion.
: The authors have been informed of the publication and gave their consent.
: The authors declare that they have no competing interests.
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