Nakahara, Yasuo
Suzuki, Ryuyo
Katagiri, Takenobu
Toguchida, Junya
Haga, Nobuhiko
Article History
Received: 30 July 2015
Revised: 21 October 2015
Accepted: 21 October 2015
First Online: 10 December 2015
Competing interests
: The authors declare no conflict of interest.