Takeda, Naoki
Yoshinaga, Kazuya
Furushima, Kenryo
Takamune, Kazufumi
Li, Zhenghua
Abe, Shin-ichi
Aizawa, Shin-ichi
Yamamura, Ken-ichi
Article History
Received: 10 March 2016
Accepted: 18 May 2016
First Online: 2 June 2016
Competing interests
: The authors declare no competing financial interests.