Zhu, Jing
Xue, Lili
Shen, Huaxiang
Zhang, Lin
Lu, Danni
Wang, Yanlin
Zhang, Yu
Zhang, Jun
Funding for this research was provided by:
Shanghai Municipal Health Commission (GWIV–26.2)
Article History
Received: 21 December 2021
Accepted: 12 May 2022
First Online: 1 June 2022
Declarations
:
: This study was approved by the Ethics Review Board of the Xinhua Hospital Affiliated to the Shanghai Jiao Tong University School of Medicine (XHEC–C–2015–006), the Research Project Review Panel (RP2) of the UNDP/UNFPA/UNICEF/WHO/World Bank Special Programme of Research, Development and Research Training in Human Reproduction, at the Department of Sexual and Reproductive Health and Research at the World Health Organization, by the WHO Research Ethics Review Committee (HRP Study A65899) and participating hospitals. Because of the retrospective nature of the study and anonymization of patient data, the requirement for informed consent was waived by the Ethics Review Board of the Xinhua Hospital Affiliated to the Shanghai Jiao Tong University School of Medicine, the WHO Research Ethics Review Committee, and participating hospitals. The study was conducted in accordance with the Guidelines of the National Human Biomedical Research Policies.
: Not applicable.
: The authors declare that they have no competing interests.