Takemoto, Ai
Okitaka, Mina
Takagi, Satoshi
Takami, Miho
Sato, Shigeo
Nishio, Makoto
Okumura, Sakae
Fujita, Naoya
Article History
Received: 19 August 2016
Accepted: 6 January 2017
First Online: 8 February 2017
Competing interests
: The authors declare no competing financial interests.