1. Department of Pathology, East-West Neo Medical Center, College of Medicine, Kyung Hee University, Seoul, Korea.
2. Department of Thoracic Surgery, Sungkyunkwan University School of Medicine, Samsung Medical Center, Seoul, Korea.
3. Department of Radiology, Sungkyunkwan University School of Medicine, Samsung Medical Center, Seoul, Korea.
4. Department of Pathology, Sungkyunkwan University School of Medicine, Samsung Medical Center, Seoul, Korea.