Yoshida, Shoji
Aizawa, Yuta
Wang, Zi-han
Oshima, Ryuji
Mera, Yutaka
Matsuyama, Eiji
Oigawa, Haruhiro
Takeuchi, Osamu
Shigekawa, Hidemi
Article History
Received: 22 December 2013
Accepted: 22 May 2014
First Online: 29 June 2014
Competing interests
: The authors declare no competing financial interests.