Received: 26 April 2020
Accepted: 19 January 2021
First Online: 21 January 2021
Ethics approval and consent to participate
: The study design was approved by the Ethics Review Committee of Beijing Shunyi District Hospital (Registration number: QR-112-045-086), and no administrative permission was required to access the raw data for this study. In addition, all subjects provided informed consent prior to participation.
: Not applicable.
: The authors declare that they have no competing interests.