Kido, Toshimi
Kurata, Hideaki
Kondo, Kazuo
Itakura, Hiroshige
Okazaki, Mitsuyo
Urata, Takeyoshi
Yokoyama, Shinji
Article History
Received: 11 February 2016
Accepted: 21 July 2016
First Online: 16 August 2016
Competing interests
: The authors declare no competing financial interests.