Arima, Takeshi
Uchiyama, Masaaki
Nakano, Yuichiro
Nagasaka, Shinya
Kang, Dedong
Shimizu, Akira
Takahashi, Hiroshi
Article History
Received: 6 October 2017
Accepted: 5 December 2017
First Online: 19 December 2017
Competing Interests
: The authors declare that they have no competing interests.