Funao, Haruki
Nagai, Shigenori
Sasaki, Aya
Hoshikawa, Tomoyuki
Tsuji, Takashi
Okada, Yasunori
Koyasu, Shigeo
Toyama, Yoshiaki
Nakamura, Masaya
Aizawa, Mamoru
Matsumoto, Morio
Ishii, Ken
Article History
Received: 19 October 2015
Accepted: 2 March 2016
First Online: 17 March 2016
Competing interests
: The authors declare no competing financial interests.