Received: 19 February 2020
Accepted: 3 November 2020
First Online: 12 November 2020
Ethics approval and consent to participate
: This study was approved by the Ethical Committee of the Shenyang Chest Hospital (No. KYXM-2016-042-01). Written informed consent was obtained from all patients before participation in the study. Data regarding personal information and infectious disease were coded and kept confidential.
: Not applicable.
: The authors declare no competing interests.