Funding for this research was provided by:
National Natural Science Foundation of China (81602860)
Key Laboratory of Public Health Safety (Fudan University), Ministry of Education, China (GW2019-10)
the Shanghai Municipal Commission of Health and Family Planning (20174Y0010)
Received: 28 April 2020
Accepted: 11 September 2020
First Online: 17 September 2020
Ethics approval and consent to participate
: The study was approved by the Ethics Committee of Shanghai First Maternity and Infant Hospital, Tongji University School of Medicine. The study was performed in accordance with the approved guidelines, and all participants provided written informed consent before enrollment.
: Not applicable.
: The authors declare that they have no competing interests.