Kuga, Takahisa
Sasaki, Mitsuho
Mikami, Toshinari
Miake, Yasuo
Adachi, Jun
Shimizu, Maiko
Saito, Youhei
Koura, Minako
Takeda, Yasunori
Matsuda, Junichiro
Tomonaga, Takeshi
Nakayama, Yuji
Article History
Received: 30 October 2015
Accepted: 5 May 2016
First Online: 25 May 2016
Competing interests
: The authors declare no competing financial interests.