1. Division of Medical Oncology; Department of Internal Medicine; Bucheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea; Republic of Korea
2. Department of Hospital Pathology; Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea; Republic of Korea
3. Division of Medical Oncology; Department of Internal Medicine; Uijeongbu St. Mary's Hospital, College of Medicine, The Catholic University of Korea; Republic of Korea
4. Division of Medical Oncology; Department of Internal Medicine; Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea; Republic of Korea
5. Department of Radiation Oncology; Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea; Republic of Korea
6. Department of Otorhinolaryngology; Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea; Republic of Korea