Hanyu, Takeshi
Shimizu, Kenji
Ushikubo, Takayuki
Kimura, Jun-Ichi http://orcid.org/0000-0002-2677-515X
Chang, Qing
Hamada, Morihisa
Ito, Motoo http://orcid.org/0000-0001-5686-0243
Iwamori, Hikaru
Ishikawa, Tsuyoshi
Article History
Received: 6 June 2018
Accepted: 9 December 2018
First Online: 4 January 2019
Competing interests
: The authors declare no competing interests.