Sugahara, Akira http://orcid.org/0000-0001-9411-2326
Ando, Yasunobu
Kajiyama, Satoshi http://orcid.org/0000-0002-2200-7524
Yazawa, Koji
Gotoh, Kazuma
Otani, Minoru
Okubo, Masashi
Yamada, Atsuo http://orcid.org/0000-0002-7880-5701
Article History
Received: 4 July 2018
Accepted: 28 January 2019
First Online: 20 February 2019
Competing interests
: The authors declare no competing interests.