1. Department of Radiology, Seoul National University College of Medicine, Seoul
2. Lunit Inc, Seoul National University Boramae Medical Center, Seoul
3. Department of Radiology, Seoul National University Boramae Medical Center, Seoul
4. Department of Radiology, Kyung Hee University Hospital at Gangdong, Seoul
5. Department of Radiology, Eulji University Medical Center, Daejon
6. Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National University College of Medicine, Korea