He, Wenbo
Xu, Changwu
Wang, Xiaoying
Lei, Jiyong
Qiu, Qinfang
Hu, Yingying
Luo, Da
Article History
Received: 29 June 2021
Accepted: 7 September 2021
First Online: 14 September 2021
Declarations
:
: This study was a secondary analysis of an observational cohort study. The original work in accordance with the Creative Commons Attribution Non-Commercial (CC BY-NC 3.0) license was approved by the Ethics Committee of The First Affiliated Hospital of Zhengzhou University. Informed consent was waived because this is a post-hoc study using available data.
: Not applicable.
: The authors declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.