Uno, Kenji
Yamada, Tetsuya
Ishigaki, Yasushi
Imai, Junta
Hasegawa, Yutaka
Sawada, Shojiro
Kaneko, Keizo
Ono, Hiraku
Asano, Tomoichiro
Oka, Yoshitomo
Katagiri, Hideki
Article History
Received: 15 April 2015
Accepted: 30 June 2015
First Online: 13 August 2015
Competing interests
: The authors declare no competing financial interests.