Dai, Shanshan
Xiao, Gang
Dong, Ning
Liu, Fei
He, Shuyang
Guo, Qingyu
Funding for this research was provided by:
Science and Technology Program of Shaanxi Province (2015KTCL03-07)
Article History
Received: 16 December 2017
Accepted: 13 August 2018
First Online: 31 August 2018
Ethics approval and consent to participate
: The study was approved by the Research Ethics Committee of Xi’an Jiaotong University, Xi’an, China.
: Not applicable.
: The authors declare that they have no competing interests.
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