Wang, Yipeng
Li, Shanshan
Wang, Wei
Dong, Yuan
Zhang, Meng
Wang, Xin
Yin, Chenghong http://orcid.org/0000-0001-6532-0783
Funding for this research was provided by:
Science and Technology Commission of Beijing Municipality (Z181100001718108)
The National Key Research and Development Program of Chin (2016YFC1000101)
Beijing Municipal Administration of Hospitals’ Ascent Pla (DFL2015130)
Article History
Received: 13 November 2019
Accepted: 2 March 2020
First Online: 12 March 2020
Ethics approval and consent to participate
: Ethical approval was provided by the Human Research Ethics Committee, Beijing Obstetrics and Gynecology Hospital, Capital Medical University (No.2019-KY-046-01).All subjects authorized the using of the data for reference by signing the consent form. (No. BJOGH201711PDC2, available since 12/20/2017; No. BJOGH201810PDC3, available since 12/06/2018).All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: All patients in this report provided their consent for publication.
: The authors declare that they have no competing interests.