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Authors
Li, Yahua
Chen, Jianjian
Li, Zhaonan
Lu, Huibin
Ren, Kewei
Ren, Jianzhuang
Han, Xinwei http://orcid.org/0000-0003-4407-4864
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Article History
Received: 18 October 2019
Accepted: 4 May 2020
First Online: 18 May 2020
Ethics approval and consent to participate
: This study was conducted with approval from the Ethics Committee of The First Affiliated Hospital of Zhengzhou University. The need for patient consent was waived due to the retrospective study design.
: Not applicable.
: The authors declare that they have no competing interests.
