Watanabe, Yasuharu
Nagai, Yoshinori
Honda, Hiroe
Okamoto, Naoki
Yamamoto, Seiji
Hamashima, Takeru
Ishii, Yoko
Tanaka, Miyako
Suganami, Takayoshi
Sasahara, Masakiyo
Miyake, Kensuke
Takatsu, Kiyoshi
Article History
Received: 6 December 2015
Accepted: 1 March 2016
First Online: 15 March 2016
Competing interests
: The authors declare no competing financial interests.