1. Department of Radiology; Seoul Medical Center; Seoul Korea
2. Department of Pulmonary and Critical Care Medicine; Kyung Hee University Hospital at Gangdong; School of Medicine, Kyung Hee University; Seoul Korea
3. Department of Pathology; Kyung Hee University Hospital at Gangdong; School of Medicine, Kyung Hee University; Seoul Korea
4. Department of Thoracic and Cardiovascular Surgery; Kyung Hee Medical Center; School of Medicine; Kyung Hee University; Seoul Korea