Shi, Lei
Fu, Qiang
Chen, Nan
Liu, Ran
Zheng, Yi
Article History
Received: 28 August 2019
Accepted: 23 March 2020
First Online: 6 April 2020
Compliance with ethical standards
:
: The authors declare that they have no competing interests.
: This study was approved by the ethics committee of the second hospital of Shanxi Medical University, and the whole research process followed the principles of the Helsinki Declaration.
: Informed consent was obtained from all individual participants included in the study.