Funding for this research was provided by:
Wellcome Trust (060120/Z/99/C)
Text and Data Mining valid from 2020-03-18
Received: 16 September 2019
Accepted: 10 March 2020
First Online: 18 March 2020
Ethics approval and consent to participate
: Informed written consent to participate in the study was obtained by a parent of each child. The protocol was approved by the Ethics Committees of the Hospital Pedro Vicente Maldonado, Pichincha Province Ecuador, Ecuador, and St George’s University of London, UK.
: Not applicable.
: RM has received grant support from Romark Laboratiories. VSH, DGR, EC, AL and PJC declare that they have no competing interests.