Lu, Jinhua
Wei, Dongmei
Shen, Songying
Xia, Xiaoyan
He, Jianrong
Sun, Yan
Lam, Kin Bong Hubert
Bao, Wei
Xia, Huimin
Qiu, Xiu http://orcid.org/0000-0003-1248-229X
Funding for this research was provided by:
National Natural Science Foundation of China (81803251)
National Natural Science Foundation of China (81673181)
Guangzhou Science, Technology and Innovation Commission (201807010086)
Article History
Received: 5 May 2020
Accepted: 21 October 2020
First Online: 4 November 2020
Ethics approval and consent to participate
: This study was approved by the institutional ethical committee board of Guangzhou Women and Children’s Medical Center (No.201924801). As only de-identified routinely collected surveillance data were used, the need for informed consent was waived by the institutional ethical committee board.
: Not applicable.
: The authors declare that they have no competing interests.