1. Department of Pathology, Yonsei University College of Medicine, Seoul, Korea.
2. Department of Pathology, Seoul National University Bundang Hospital, Seongnam, Korea.
3. Department of Pathology, Inha University School of Medicine, Incheon, Korea.
4. Department of Pathology, Ilsan Paik Hospital, Inje University College of Medicine, Goyang, Korea.
5. Department of Pathology, Konkuk University School of Medicine, Seoul, Korea.
6. Department of Pathology, National Cancer Center, Goyang, Korea.
7. Department of Pathology, Yonsei University Wonju College of Medicine, Wonju, Korea.
8. Department of Pathology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.