Yang, Yong
Yan, Wenkang
Ruan, Minyi
Zhang, Lan
Su, Jinzhen
Deng, Haohui
Li, Minxu
Article History
Received: 30 December 2020
Accepted: 23 December 2021
First Online: 3 January 2022
Declarations
:
: This study was approved by the institutional review board of Dongguan Maternal and Child Health Hospital [2016 [CitationRef removed]]. Written informed consent was obtained from the parents.
: Not applicable.
: The authors declare that they have no competing interests.