Kurita, Souichi
Takeuchi, Keisuke
Hayashi, Yoshimi
Ueyama, Hisao
Zankov, Dimitar P
Pang, Xiaoling
Otsuka, Takanobu
Ohkubo, Iwao
Ogikubo, Osamu
Ogita, Hisakazu
Article History
Received: 2 September 2014
Revised: 6 October 2014
Accepted: 14 October 2014
First Online: 27 November 2014
Competing interests
: The authors declare no conflict of interest.