Okamoto, Nobuhiko
Watanabe, Miki
Naruto, Takuya
Matsuda, Keiko
Kohmoto, Tomohiro
Saito, Masako
Masuda, Kiyoshi
Imoto, Issei
Article History
Received: 10 October 2016
Revised: 4 November 2016
Accepted: 4 November 2016
First Online: 19 January 2017
Competing interests
: The authors declare no conflict of interest.