,
Fujisaki, Kiichiro
Tsuruya, Kazuhiko
Nakano, Toshiaki
Taniguchi, Masatomo
Higashi, Harumichi
Katafuchi, Ritsuko
Kanai, Hidetoshi
Nakayama, Masaru
Hirakata, Hideki
Kitazono, Takanari
Article History
Received: 19 January 2014
Revised: 18 April 2014
Accepted: 22 May 2014
First Online: 26 June 2014
Competing interests
: The authors declare no conflict of interest.