Kimura, Yuka
Koike, Shin
Shibuya, Norihiro
Lefer, David
Ogasawara, Yuki
Kimura, Hideo
Article History
Received: 30 June 2017
Accepted: 17 August 2017
First Online: 5 September 2017
Competing Interests
: The authors declare that they have no competing interests.