Kohagura, Kentaro
Tana, Takeshi
Higa, Akira
Yamazato, Masanobu
Ishida, Akio
Nagahama, Kazufumi
Sakima, Atsushi
Iseki, Kunitoshi
Ohya, Yusuke
Article History
Received: 3 December 2015
Revised: 15 February 2016
Accepted: 29 February 2016
First Online: 14 April 2016
Competing interests
: The authors declare no conflict of interest.
Free to read: This content has been made available to all.