Iwai-Shimada, Miyuki
Takahashi, Tsutomu
Kim, Min-Seok
Fujimura, Masatake
Ito, Hitoyasu
Toyama, Takashi
Naganuma, Akira
Hwang, Gi-Wook
Article History
Received: 24 August 2016
Accepted: 7 November 2016
First Online: 2 December 2016
Competing interests
: The authors declare no competing financial interests.