Zhang, Bo-xing
Azuma, Jun-ichi
Takeno, Shinya
Suzuki, Nobuaki
Nakazawa, Yoshihisa
Uyama, Hiroshi
Article History
Received: 12 September 2015
Revised: 8 January 2016
Accepted: 8 January 2016
First Online: 16 March 2016
Competing interests
: The authors declare no conflict of interest.
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