Division of Pulmonary and Critical Care Medicine, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea;
Division of Pulmonary and Critical Care Medicine, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea;
Division of Thoracic and Cardiovascular Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea;
Division of Pathology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea;
Division of Pathology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea;