Funding for this research was provided by:
Assistance Publique - Hôpitaux de Paris (PHRC 2012-A00538-35)
Received: 5 November 2019
Accepted: 27 January 2020
First Online: 4 February 2020
Ethics approval and consent to participate
: This study was approved by the institutional ethics committee (<i>Comité de Protection des Personnes-Ile de France VII</i> (N°12–025)), and by the French national drug safety agency, the <i>Agence Nationale de Sécurité du Médicament</i> (B120601–10). Written informed consent was obtained from the parents of the patients.
: Not applicable.
: The authors declare that they have no competing interests.