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Authors
Wang, Jin
Zhang, Hanlin
Fan, Hongyang
Chen, Kang
Zhang, Yuelun
Song, Kaicheng
Ao, Hushan
Yu, Chunhua http://orcid.org/0000-0001-5531-6721
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Article History
Received: 30 March 2019
Accepted: 10 February 2020
First Online: 3 March 2020
Ethics approval and consent to participate
: The institutional review board of Peking Union Medical College Hospital waived approval for this minimal-risk retrospective study and the need for consent according to the institutional guidelines.
: Not applicable.
: The authors declare that they have no competing interests.
