1. Division of Medical Oncology, Department of Internal Medicine, Yonsei Cancer Center, Yonsei University College of Medicine, Seoul, South Korea
2. Sondang Institute for Cancer Research, Yonsei University College of Medicine, Seoul, South Korea
3. Department of Pathology, Yonsei University College of Medicine, Seoul, South Korea
4. Department of Hematology-Oncology, Chonnam National University Medical School and Hwasun Hospital, Hwasun, South Korea
5. Division of Hematology and Oncology, Department of Internal Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, South Korea
6. Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, South Korea
7. Division of Oncology, Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
8. Department of Internal Medicine, Chung-Ang University Hospital, Chung-Ang University College of Medicine, Seoul, South Korea
9. Division of Hematology-Oncology, Department of Internal Medicine, Hallym University Sacred Heart Hospital, Anyang, South Korea
10. Department of Hematology-Oncology, Ajou University School of Medicine, Suwon, South Korea
11. Department of Preventive Medicine, Yonsei University College of Medicine, Seoul, South Korea
12. Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, South Korea