Funding for this research was provided by:
National Natural Science Foundation of China (81671078)
Shanghai Municipal Commission of Health and Family Planning Project (201840319)
Received: 8 March 2020
Accepted: 13 July 2020
First Online: 25 July 2020
Ethics approval and consent to participate
: Clinical trial registration number: ExternalRef removed. Registry URL: ExternalRef removed.
: Not applicable.
: The authors declare that they have no competing conflicts of interest.