Tu, Xinzhi
Duan, Chun
Lin, Bingying
Li, Kangfeng
Gao, Jie
Yan, Huaying
Wang, Kejian http://orcid.org/0000-0003-4221-2485
Zhao, Zhao
Article History
Received: 11 October 2021
Accepted: 30 March 2022
First Online: 7 April 2022
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of Shenzhen Maternity & Child Healthcare Hospital on 20th February 2019. (No. SFYLS [2019] 062). All participants provided written informed consent in the study.
: Not Applicable.
: The authors declare that they have no competing interests.