Received: 14 December 2021
Accepted: 4 April 2022
First Online: 11 April 2022
: All experimental protocol were approved by the Ethical Committee for Epidemiology of Hiroshima University (E-941-1). All methods were carried out in accordance with relevant guidelines and regulations. Informed consent was obtained from the guardians of all participants.
: Not applicable.
: The authors declare that they have no competing interests.