This study was presented at the
Annual Meeting of the Society for Maternal-Fetal
Medicine (SMFM), January 2020 (Poster # 888).
Disclosure of Interests: The authors report no financial interest.
The authors report no conflict of interest.Contribution to Authorship:Conception: RL, YZ, YG, DV
Planning: EM, RB, ZW, YG
Carrying out: RL, CB, GB, NJ
Analysing: RL, NJ, YZ, DV
Writing of work: RL, CB, YZ, RBDetails of Ethics Approval:
The study was approved by our local Research Ethics Board (0361-19-RMB),
on:
December 2nd , 2019.