Sugata, Hisato
Hirata, Masayuki
Yanagisawa, Takufumi
Matsushita, Kojiro
Yorifuji, Shiro
Yoshimine, Toshiki
Article History
Received: 29 June 2015
Accepted: 4 April 2016
First Online: 19 April 2016
Competing interests
: The authors declare no competing financial interests.