Received: 20 April 2020
Accepted: 9 September 2020
First Online: 3 November 2020
Ethics approval and consent to participate
: The study was approved by the Ethics Committee at Hiroshima University Graduate School of Biomedical and Health Sciences (E-452).
: Not applicable.
: Keisuke Yasuda, Shinsuke Okada, Yohei Okazaki, Kyou Hiasa, Kazuhiro Tsuga, and Yasuhiko Abe declare that they have no competing interests in regard to the current study.