1. Cancer Center, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 135-710, Korea and Division of Hematology and Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 135-710, Korea
2. Cancer Center, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 135-710, Korea
3. Division of Hematology and Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 135-710, Korea.
4. Cancer Center, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 135-710, Korea and Division of Hematology and Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 135-710, Korea.
5. Division of Hematology and Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 135-710, Korea and Department of Medicine, St. Vincent's Hospital, Catholic University, Suwon 442-723, Korea
6. Department of General Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 135-710, Korea
7. Department of Otorhinolaryngology/Head and Neck Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 135-710, Korea
8. Department of Diagnostic Pathology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 135-710, Korea
9. Department of Dermatology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 135-710, Korea
10. Department of Clinical Pathology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 135-710, Korea
11. Department of Radiation Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 135-710, Korea
12. Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 135-710, Korea
13. Department of Obstetrics and Gynecology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 135-710, Korea
14. Department of Internal Medicine, Asan Medical Center, Ulsan University, Seoul 138-736, Korea
15. Department of Internal Medicine, Seoul National University Hospital, Seoul 110-744, Korea
16. Department of General Surgery, Korea Cancer Center, Seoul, 139-706, Korea
17. Department of Internal Medicine, Ewha Womans University Hospital, Seoul 110-126, Korea
18. Institute for Molecular Biology and Genetics, Seoul National University, Seoul 151-742, Korea
19. University of Pittsburgh School of Medicine, Pittsburgh, PA 15261