1. Division of Hematology Oncology Department of Internal Medicine Yongin Severance Hospital Yonsei University College of Medicine Yongin South Korea
2. Division of Medical Oncology Department of Internal Medicine Yonsei Cancer Center Yonsei University College of Medicine Seoul South Korea
3. Graduate School of Medical Science, Brain Korea 21 Project Yonsei University College of Medicine Seoul Korea
4. Palliative Care Center Yonsei Cancer Center Seoul South Korea
5. Department of Biomedical Systems Informatics Yonsei University College of Medicine Seoul South Korea
6. Medical Oncology CHA Bundang Medical CenterCHA University Seongnam South Korea