Akita, Masaki
Tak, Yon-Soo
Shimura, Tsutomu
Matsumoto, Syota
Okuda-Shimizu, Yuki
Shimizu, Yuichiro
Nishi, Ryotaro
Saitoh, Hisato
Iwai, Shigenori
Mori, Toshio
Ikura, Tsuyoshi
Sakai, Wataru
Hanaoka, Fumio
Sugasawa, Kaoru
Article History
Received: 28 November 2014
Accepted: 12 May 2015
First Online: 4 June 2015
Competing interests
: The authors declare no competing financial interests.