Received: 19 June 2019
Accepted: 29 December 2019
First Online: 8 January 2020
Ethics approval and consent to participate
: The French Ethic committee CPP (Comité pour la Protection des Personnes) Sud Est IV gave its approval for the study (ID-RCB: 2015-A01992–47, CPP: 16/005). The patient and his parents gave their written consent to participate.
: The patient and his parents gave their written consent for publication.
: The authors declare that they have no competing interests.