Xu, Zhifang
Ohtaki, Hirokazu
Watanabe, Jun
Miyamoto, Kazuyuki
Murai, Norimitsu
Sasaki, Shun
Matsumoto, Minako
Hashimoto, Hitoshi
Hiraizumi, Yutaka
Numazawa, Satoshi
Shioda, Seiji
Article History
Received: 30 October 2015
Accepted: 15 February 2016
First Online: 29 February 2016
Competing interests
: The authors declare no competing financial interests.