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Authors
Yang, Xiaohan
Duan, Lei
Zhan, Wenli
Tang, Yuan
Liang, Lihua
Xie, Jia
Luo, Mingyong
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Funding
Funding for this research was provided by:
Natural Science Foundation of Guangdong Province (2022A1515012226)
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Article History
Received: 4 February 2022
Accepted: 4 January 2023
First Online: 9 January 2023
Declarations
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: The study protocol was approved by the ethics committee of the Guangdong Women and Children Hospital (ref. 202101324). Requirement of written informed consent was waived, since virological testing in patients who underwent regular medical examination at the hospital was a routine diagnostic procedure. All information collected from patients was delinked from individual patient identifiers. This study was performed in accordance with the Helsinki Declaration of 1964, and its later amendments.
: Not applicable.
: The authors declare that they have no competing interests.
