Received: 17 June 2021
Accepted: 15 December 2021
First Online: 4 January 2022
: Informed consent was waived by the Human Science and Ethics Committee of Beijing Ditan Hospital, Capital Medical University, due to the retrospective nature of the study and the anonymized data obtained from the medical records of the participants. The clinical ethics review committee of Beijing Ditan Hospital approved the study procedure. All procedures were carried out following the relevant guidelines and regulations.
: Not applicable.
: The authors declare that they have no competing interests.