Funding for this research was provided by:
National Natural Science Foundation of China (81771529, 81572546)
Shanghai Science and Technology Development Foundation (17441902500)
Shanghai Hospital Development Center Foundation (16CR3089B)
Received: 12 July 2019
Accepted: 21 October 2019
First Online: 21 November 2019
Ethics approval and consent to participate
: This study was approval by the Institutional Ethics Committee of Shanghai First Maternity and Infant Hospital, Tongji University School of Medicine (No: KS 1714). Informed consent was obtained from the studied patients.
: Informed consent Informed consent was obtained from all individual participants included in the study.
: The authors declare that they have no competing interests.