Funding for this research was provided by:
Japan Society for the Promotion of Science (KAKENHI Grant number 15J08743)
Article History
Received: 30 May 2019
Accepted: 19 December 2020
First Online: 3 January 2021
Compliance with ethical standards
:
: We have no competing interests.
: This study was carried out under permission no. 21 from the Kagoshima government education commission. This permission includes ethic statement.