Nishiyama, Norimasa
Ishikawa, Ryo
Ohfuji, Hiroaki
Marquardt, Hauke
Kurnosov, Alexander
Taniguchi, Takashi
Kim, Byung-Nam
Yoshida, Hidehiro
Masuno, Atsunobu
Bednarcik, Jozef
Kulik, Eleonora
Ikuhara, Yuichi
Wakai, Fumihiro
Irifune, Tetsuo
Article History
Received: 10 November 2016
Accepted: 13 February 2017
First Online: 17 March 2017
Competing interests
: The authors declare no competing financial interests.