1. Department of Thoracic and Cardiovascular Surgery College of Medicine, Chungbuk National University, Chungbuk National University Hospital Cheong‐ju South Korea
2. Department of Health Informatics and Management College of Medicine, Chungbuk National University Cheongju South Korea
3. Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine Chungbuk National University Hospital Cheong‐ju South Korea
4. Center for lung cancer National Cancer Center Goyang South Korea
5. Department of Thoracic and Cardiovascular Surgery College of Medicine, Korea University Seoul South Korea