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Authors
Yu, Xue
Wang, Yanping
He, Chunhua
Kang, Leni
Miao, Lei
Wu, Yan
Yang, Shirong
Zhu, Jun
Liang, Juan
Li, Qi
Dai, Li
Li, Xiaohong
Deng, Kui
Tao, Jing
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Funding
Funding for this research was provided by:
the Ministry of Health (QT2003-009 and 05wsb-02)
UNICEF (YH601-11-1141)
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Article History
Received: 29 December 2021
Accepted: 28 March 2023
First Online: 11 April 2023
Declarations
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: This study was approved by the Ethics Committee of West China Second University Hospital, Sichuan University, China. And all methods were performed in accordance with the relevant guidelines and regulations. The requirement for informed consent from a parent and/or legal guardian was waived by the Ethics Committee of West China Second University Hospital, Sichuan University, China, because of the retrospective nature of the study.
: Not applicable
: The authors declare that they have no competing interests.
