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Authors
Yu, Hong-Zhi
Guo, Xiao-Bo
Liu, Zhao
Zhang, Zhe
Feng, Hai
Chen, Xue-Ming
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Article History
Received: 13 May 2020
Accepted: 22 September 2020
First Online: 29 September 2020
Ethics approval and consent to participate
: The study protocol was approved by the Ethics Committee of Beijing Friendship Hospital, Capital Medical University. Written informed consent was obtained from all the study subjects before enrollment.
: Not applicable.
: The authors declare that they have no competing interests.
