Kumura, Ko
Wakiyama, Yoshinari
Ueda, Kazutaka
Umemura, Eijiro
Watanabe, Takashi
Kumura, Megumi
Yoshida, Takuji
Ajito, Keiichi
Article History
Received: 11 August 2016
Revised: 25 September 2016
Accepted: 23 October 2016
First Online: 7 December 2016
Competing interests
: The authors declare no conflict of interest.
Free to read: This content has been made available to all.