Liu, Mingjie
Ishida, Yasuhiro
Ebina, Yasuo
Sasaki, Takayoshi
Hikima, Takaaki
Takata, Masaki
Aida, Takuzo
Article History
Received: 15 March 2014
Accepted: 4 November 2014
First Online: 31 December 2014
Competing interests
: The authors declare no competing financial interests.