aDivision of Chest Medicine, Department of Internal Medicine, Taichung Veterans General Hospital, Taichung

bTaipei Veterans General Hospital Taoyuan Branch, Taoyuan

cInstitute of Biomedical Sciences, National Chung Hsing University

dDepartment of Radiation Oncology, Taichung Veterans General Hospital

eDivision of Critical Care and Respiratory Therapy, Department of Internal Medicine, Taichung Veterans General Hospital

fCollege of Medicine, National Yang Ming Chiao Tung University, Taipei

gDivision of Pulmonary Medicine, Department of Internal Medicine, Chung Shan Medical University Hospital, Taichung

hSchool of Medicine, Chung Shan Medical University, Taichung

iInstitute of Medicine, Chung Shan Medical University

jDepartment of Post-Baccalaureate Medicine, College of Medicine, National Chung Hsing University

kDepartment of Life Sciences, National Chung Hsing University, Taichung, Taiwan

Received 28 April 2022 Revised form accepted 28 April 2022

Correspondence to Jeng-Sen Tseng, MD, PhD, Division of Chest Medicine, Department of Internal Medicine, Taichung Veterans General Hospital, No.1650, Sect. 4, Taiwan Boulevard, Taichung, 407, Taiwan, R.O.C, Tel: +886-4-23592525, ext. 3232; fax: +886-4-23741320; e-mail: [email protected]