Minami, Yasuo
Araki, Kotaro
Dao, Thang Duy
Nagao, Tadaaki
Kitajima, Masahiro
Takeda, Jun
Katayama, Ikufumi
Article History
Received: 24 December 2014
Accepted: 5 October 2015
First Online: 2 November 2015
Competing interests
: The authors declare no competing financial interests.