Funding for this research was provided by:
Research Foundation of Shenzhen Baoan Women’s and Children’s Hospital, Jinan University (BAFY 2021001)
Shenzhen Key Medical Discipline Construction Fund (SZXK028)
Received: 15 September 2021
Accepted: 7 February 2022
First Online: 6 April 2022
: This study obtained approval from the Ethical Committees of Shenzhen Baoan Women's and Children's Hospital (approval number: LLSC 2020–09-02-KS). The authors declare that all samples involved in the study were collected with the written informed consents were obtained from the parents of infants. And there were no adolescent mothers (under the age of 18) in this study.
: Not applicable.
: The authors declare that they have no competing interests.