Yoshida, Toshiaki
Mimura, Mayumi
Sakon, Naomi
Funding for this research was provided by:
the Ministry of Education, Culture, Sports, Science and Technology of the Japanese Government (MEXT)/Japan Society for the Promotion of Science (JSPS) KAKENHI (26460820)
Article History
Received: 29 November 2019
Accepted: 11 March 2020
First Online: 26 March 2020
Compliance with ethical standards
: This study was carried out after approval by the Ethical Review Committee of the Osaka Prefectural Institute of Public Health. Written informed consent was obtained from the parents of all the children before the study.
: The authors declare that they have no conflict of interest.