Funding for this research was provided by:
Japan Society for the Promotion of Science (S2509, a Grants-in-Aid for International Scientific Research (A), 17H01684, DC2, PD)
Ministry of Education, Culture, Sports, Science and Technology (Leading Program)
Text and Data Mining valid from 2019-04-15
Received: 30 January 2019
Accepted: 21 March 2019
First Online: 15 April 2019
Ethics approval and consent to participate
: The ethical review unit of KEMRI reviewed and approved this study (SERU No. 3092), and ethical review board of Institute of Tropical Medicine, Nagasaki University, Japan (No. 10121666). All parents/guardians gave a written consent while the preschool children ascended to the study.
: Publication for this report was authorized by the director KEMRI.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.