Lu, Yaheng
Xiong, Ying
Wen, Yizhou
Yang, Yanfeng
Liu, Hanmin
Article History
Received: 24 June 2023
Accepted: 29 November 2023
First Online: 8 December 2023
Declarations
:
: This retrospective study was approved by the Medical Ethics Committee of the Chengdu Women’s and Children’s Central Hospital, Chengdu, China, and was approved with a waiver of informed consent due to research not involving greater than minimal risk and the retrospective nature of the study. This study was performed in accordance with the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards.
: Not Applicable.
: The authors declare no competing interests.