Hashizume, Hideki
Iijima, Kiyoko
Yamashita, Kazuma
Kimura, Tomoyuki
Wada, Shun-ichi
Sawa, Ryuichi
Igarashi, Masayuki
Article History
Received: 9 August 2017
Revised: 2 October 2017
Accepted: 4 October 2017
First Online: 15 November 2017
Competing interests
: The authors declare no conflict of interest.
Free to read: This content has been made available to all.