Sun, Yun
Chen, Xiuying
Qian, Zhida
Cao, Lili
Zhan, Sifeng
Huang, Lili
Funding for this research was provided by:
Medical and Health Technology Development Plan of Shandong Province of China (2019WS213)
Science and Technology Development Plan Project of Tai,an City of China (2020NS099)
Article History
Received: 18 May 2022
Accepted: 10 August 2022
First Online: 29 August 2022
Declarations
:
: All procedures were performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments. This study was approved by the Ethics Committee of the Women's Hospital, Zhejiang University School of Medicine (IRB-20200100-R). The informed consent was waived as this was a retrospective study.
: Not applicable.
: The authors declare that they have no competing interests.