Kijima, Tsunetaka
Matsushita, Akira
Akai, Kenju
Hamano, Tsuyoshi
Takahashi, Satoshi
Fujiwara, Kazushige
Fujiwara, Yuko
Sato, Makoto
Nabika, Toru
Sundquist, Kristina
Sundquist, Jan
Ishibashi, Yutaka
Kumakura, Shunichi
Funding for this research was provided by:
Japan Society for the Promotion of Science KAKENHI grant
Article History
Received: 15 January 2020
Accepted: 15 March 2021
First Online: 25 March 2021
Declarations
:
: The Shimane University Institutional Committee on Ethics approved this study (approval number: 2763). This committee approved a simplified procedure for obtaining informed consent, given that participation entailed only responding to the questionnaire. When participants returned a completed questionnaire after receiving an explanation of the study, informed consent was considered to have been provided.
: Not applicable.
: The authors declare that they have no competing interests.