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Authors
Wang, Yuming
Gao, Fuqiang
Yi, Ping
Cao, Hong
Zou, Haibo
Zhang, Shuai
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Article History
Received: 30 November 2019
Revised: 19 February 2020
Accepted: 10 March 2020
First Online: 25 March 2020
Compliance with ethical standards
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: The authors declare that they have no conflicts of interest.
: This retrospective study was approved by the Office of the Data Protection China-Japan Friendship Hospital, Beijing, China. The data gathering and analysis were performed with the permission of the China-Japan Friendship Hospital.
