Noda, Takeshi
Murakami, Shin
Nakatsu, Sumiho
Imai, Hirotaka
Muramoto, Yukiko
Shindo, Keiko
Sagara, Hiroshi
Kawaoka, Yoshihiro
Article History
Received: 10 July 2017
Accepted: 6 December 2017
First Online: 4 January 2018
Competing interests
: The authors declare no competing financial interests.