Yang, Chunyan
Sun, Yingying
Li, Xinjie
Li, Cheng
Tong, Junfeng
Li, Jianfeng
Zhang, Peng
Xia, Yangjun
Funding for this research was provided by:
National Natural Science Foundation of China (51602139)
Excellent Team of Scientific Research in Lanzhou Jiaotong University (201705)
Article History
Received: 17 April 2018
Accepted: 7 June 2018
First Online: 20 June 2018
Competing Interests
: The authors declare that they have no competing interests.
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