1. Department of Pathology, Gachon Medical School Gil Medical Center, Incheon, Korea.
2. Department of Pathology, Sungkyunkwan University School of Medicine, Samsung Medical Center, Seoul, Korea.
3. Department of Thoracic Surgery, Sungkyunkwan University School of Medicine, Samsung Medical Center, Seoul, Korea.
4. Department of Radiology and Center for Imaging Science, Sungkyunkwan University School of Medicine, Samsung Medical Center, Seoul, Korea.