Funding for this research was provided by:
Bill and Melinda Gates Foundation (OPP1129535)
Received: 8 September 2019
Accepted: 30 December 2019
First Online: 8 January 2020
Ethics approval and consent to participate
: This study was approved by the ethical review board of the Institute of Tropical Medicine, Nagasaki University (Approval No. 161208162). All potential participants (aged 2–14 years) and their parents or guardians were informed of the purpose, methods, potential risks and benefits, result dissemination, and confidentiality of the study during in-person briefings or by written recruitment materials. Parents or guardians of all participants in this study provided written informed consent on their behalf.
: Not applicable.
: The authors declare that they have no competing interests. HI is employed in a commercial clinical laboratory company, BML. However, any competing interests, including consultancy, patents, products in development or marketed products, do not exist between BML and this research.