Received: 25 December 2020
Accepted: 9 July 2021
First Online: 23 July 2021
: The study protocol was approved by the ethics committee of the Japan Environment and Children’s Study (JECS). The JECS protocol was approved by the Ministry of the Environment’s Institutional Review Board on Epidemiological Studies (no. 100910001) and by the Ethics Committees of all the participating institutions. Written informed consent was obtained from all the study participants. All the experiment protocol for involving human data was in accordance with the guidelines of national/international/institutional or Declaration of Helsinki.
: Not applicable.
: The authors have no conflicts of interest to declare.