Takeura, Naoto
Nakajima, Hideaki
Watanabe, Shuji
Honjoh, Kazuya
Takahashi, Ai
Matsumine, Akihiko
Article History
Received: 3 July 2019
Accepted: 15 October 2019
First Online: 30 October 2019
Competing interests
: The authors declare no competing interests.