1. Department of Radiology, Seoul National University College of Medicine, Seoul, South Korea
2. Lunit Inc, Seoul, South Korea
3. Department of Radiology, Seoul National University Boramae Medical Center, Seoul, South Korea
4. Department of Radiology, Kyung Hee University Hospital at Gangdong, Kyung Hee University College of Medicine, Seoul, South Korea
5. Department of Radiology, Eulji University Medical Center, College of Medicine, Seoul, South Korea
6. Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National University College of Medicine, Seoul, South Korea
7. Pôle Imagerie, Centre Hospitalier Universitaire de Grenoble, La Tronche, France