Received: 21 April 2021
Accepted: 19 November 2021
First Online: 20 December 2021
: This retrospective study was conducted in accordance with the principles outlined in the Declaration of Helsinki and was approved by the Research Ethics Committee of Affiliated Hospital of Zunyi Medical University (reference number: KLL-2020-022). Informed consent was waived by the Research Ethics Committee of Affiliated Hospital of Zunyi Medical University due to the anonymous nature of the data.
: Not applicable.
: The authors declare that they have no competing interests.