Funding for this research was provided by:
Foundation from Guangzhou Institute of Respiratory Health (2019GIRHZ04)
ZHONGNANSHAN MEDICAL FOUNDATION OF GUANGDONG PROVINCE (ZNSA-2020013)
Received: 17 August 2021
Accepted: 31 October 2021
First Online: 7 November 2021
: This study was carried out in accordance with the principles of the Declaration of Helsinki and was approved by the Ethics Review Committee of the First Affiliated Hospital of Guangzhou Medical University (No. 128, 2020). Patient approval and informed consent were obtained from each patient.
: Not applicable.
: The authors declare that they have no competing interests.