Umitsu, Masataka
Sakai, Katsuya
Ogasawara, Satoshi
Kaneko, Mika K.
Asaki, Ryoko
Tamura-Kawakami, Keiko
Kato, Yukinari
Matsumoto, Kunio
Takagi, Junichi
Article History
Received: 29 April 2016
Accepted: 22 August 2016
First Online: 9 September 2016
Competing interests
: The authors declare no competing financial interests.