Takeuchi, Takumi
Hattori-Kato, Mami
Okuno, Yumiko
Kanatani, Atsushi
Zaitsu, Masayoshi
Mikami, Koji
Article History
Received: 17 May 2016
Accepted: 6 October 2016
First Online: 21 October 2016
Competing interests
: The authors declare no competing financial interests.