Nishiyama, Norimasa
Wakai, Fumihiro
Ohfuji, Hiroaki
Tamenori, Yusuke
Murata, Hidenobu
Taniguchi, Takashi
Matsushita, Masafumi
Takahashi, Manabu
Kulik, Eleonora
Yoshida, Kimiko
Wada, Kouhei
Bednarcik, Jozef
Irifune, Tetsuo
Article History
Received: 8 August 2014
Accepted: 9 September 2014
First Online: 9 October 2014
Competing interests
: The authors declare no competing financial interests.