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Authors
Zong, Ye
Zhao, Haiying
Sun, Can
Ji, Ming
Wu, Yongdong
Zhang, Shutian
Wang, Yongjun
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Article History
Received: 10 October 2019
Accepted: 18 March 2020
First Online: 6 April 2020
Ethics approval and consent to participate
: Beijing Friendship Hospital Research Ethics Committee has approved this research. And all patients signed a consent form giving permission to use their anonymous data for research.
: All patients signed a consent form giving permission for publication.
: The authors have no conflicts of interest. The authors are responsible for the content of the paper.
