Ke, Yefang
Ye, Lina
Zhu, Pan
Sun, Ying
Zhu, Zhe
Funding for this research was provided by:
Ningbo Public Service Techology Foundation, China (2021S155, 2021S155)
Article History
Received: 26 November 2021
Accepted: 24 March 2022
First Online: 28 March 2022
Declarations
:
: This study was approved by Ningbo Women and Children’s Hospital Ethics Committee and our committee’s reference number was EC2021-028. The informed consent was waived for this retrospective study by Ningbo Women and Children’s Hospital Ethics Committee. All methods were carried out in accordance with relevant guidelines and regulations.
: Not applicable.
: The authors declare that they have no conflict of interest.