Received: 5 June 2021
Accepted: 23 September 2021
First Online: 19 October 2021
: The designed protocol (FJPHBCS_1224 dated 23 January 2020) was approved by the Fujian Medical University review board and the Chinese Society of Radiology. The study reporting adheres to the law of China and the V2008 Declarations of Helsinki. Informed consent was not required from women because the study is a retrospective analysis.
: Informed consent was not required from women regarding publication because the study is a retrospective analysis.
: The authors declare that they have no competing interests.