Funding for this research was provided by:
Major Research Plan (81971437, 81571487)
Science and Technology Commission of Shanghai Municipality (201409005800)
Received: 20 February 2020
Accepted: 1 July 2020
First Online: 6 July 2020
Ethics approval and consent to participate
: The study was approved by the Institutional Review Boards of Shanghai Eighth Peoples’ Hospital, and all pregnant women participating in the study provided informed written consent.
: Not applicable.
: The authors have no other relevant affiliations or financial involvement with any organization or entity with a financial interest in or financial conflict with the subject matter or materials discussed in the manuscript apart from those disclosed.