Accepted: 3 November 2020
First Online: 11 November 2020
Compliance with Ethical Standards
: The authors declare that they have no conflict of interest.
: The present study was approved by Jinzhou Medical University Research Ethics Committee involving human beings. (ref. no. JYDLL2020002). In addition, our study protocol was conducted according to the provisions of the Declaration of Helsinki (as revised in Edinburgh 2000). All participants were briefed about the study protocol and informed consent was obtained from them.
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