Gao, Xianda
Li, Jia
Shi, Yiqing
Li, Shaoqing
Shen, Yong
Article History
Received: 29 November 2017
Accepted: 6 April 2018
First Online: 16 April 2018
Ethics approval and consent to participate
: This study was approved by the Institutional Ethics Board of the Third Hospital of Hebei Medical University, and informed consent was obtained from all individual participants included in the study.
: The authors declare that they have no competing interests.
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