Funding for this research was provided by:
Fonds Wetenschappelijk Onderzoek (G.0189.13N)
Wellcome Trust (088862/Z/09/Z, 072405/Z/03/Z)
Received: 6 January 2020
Accepted: 29 April 2020
First Online: 12 May 2020
Ethics approval and consent to participate
: This study was approved by the Ethics Committees of Hospital Pedro Vicente Maldonado (2003), Universidad San Francisco de Quito (2010), and Universidad Internacional del Ecuador (2015). Written consent from the child’s mother or the legal guardian was obtained for participation in the study.
: Not applicable.
: The authors declare that they have no competing interests.