Kikuchi, Ippei
Takahashi-Kanemitsu, Atsushi
Sakiyama, Natsuki
Tang, Chao
Tang, Pei-Jung
Noda, Saori
Nakao, Kazuki
Kassai, Hidetoshi
Sato, Toshiro
Aiba, Atsu
Hatakeyama, Masanori
Article History
Received: 9 December 2015
Accepted: 11 August 2016
First Online: 21 September 2016
Competing interests
: The authors declare no competing financial interests.