Funding for this research was provided by:
Médecins sans Frontières Operational Center Paris
Received: 7 March 2018
Accepted: 10 July 2018
First Online: 20 September 2018
Ethics approval and consent to participate
: The study was approved by the ethics committees of the Comité Consultatif National d’Éthique, Niger and the Comité de Protection des Personnes, Île-de-France XI, Paris. Written informed consent was obtained from the parent or legal guardian of all participating children.
: Not applicable.
: The authors declare that they have no competing interests.
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