Ding, Xiaoyan
Yang, Jingwei
Li, Lan
Yang, Na
Lan, Ling
Huang, Guoning
Ye, Hong
Article History
Received: 4 September 2020
Accepted: 5 March 2021
First Online: 12 March 2021
Declarations
:
: The study was approved by the Ethics Committee Review Board of Chongqing Health Center for Women and Children (No. 2019 − 1208) for retrospective analysis and clinical data reporting.
: Not applicable.
: All the authors declare that we have no competing interests.