Funding for this research was provided by:
Hubei Province Natural Science Foundation (2020BCB002, 2020BCB002, 2020BCB002)
Hubei Province health and family planning scientific research project (WJ2018H0132, WJ2018H0132)
Received: 9 August 2021
Accepted: 1 March 2022
First Online: 12 March 2022
: This study was approved by the Ethics Committee of the Maternal and Child Health Hospital of Hubei Province, and informed consent was obtained from the parents. Our research have been performed in accordance with the Declaration of Helsinki.
: Not applicable.
: The authors have declared no conflicts of interest.