Tang, Qinggong
Tsytsarev, Vassiliy
Liang, Chia-Pin
Akkentli, Fatih
Erzurumlu, Reha S.
Chen, Yu
Article History
Received: 8 January 2015
Accepted: 28 October 2015
First Online: 27 November 2015
Competing interests
: The authors declare no competing financial interests.