Yin, Binbin
Hu, Lingwei
Meng, Xingjun
Wu, Kaiqi
Zhang, Long
Zhu, Yuning
Funding for this research was provided by:
the National Key R&D Program of China (2018YFC1002702)
Article History
Received: 4 January 2021
Accepted: 22 February 2021
First Online: 25 March 2021
Compliance with ethical standards
:
: The authors declare that there are no conflicts of interest regarding the publication of this paper.
: This study was approved by the Medical Ethics Committee of Women’s Hospital, School of Medicine, Zhejiang University, Hangzhou, China (Approval number: IRB-20200037-R). Since this is a retrospectively observational study with no intervention, the Ethics Committee of Women's Hospital Affiliated to Zhejiang University School of Medicine has determined exemption for informed consent of the study participants.
: Not applicable for this study.