Arima, H
Hasegawa, T
Togawa, D
Yamato, Y
Kobayashi, S
Yasuda, T
Matsuyama, Y
Article History
Received: 28 January 2014
Revised: 18 May 2014
Accepted: 7 July 2014
First Online: 5 August 2014
Competing interests
: The authors declare no conflict of interest.