Shiraishi, Yutaro
Natsume, Mei
Kofuku, Yutaka
Imai, Shunsuke
Nakata, Kunio
Mizukoshi, Toshimi
Ueda, Takumi http://orcid.org/0000-0001-9677-0912
Iwaï, Hideo http://orcid.org/0000-0001-7376-5264
Shimada, Ichio
Article History
Received: 1 July 2017
Accepted: 15 December 2017
First Online: 15 January 2018
Competing interests
: The authors declare no competing financial interests.