1. Department of Pediatric Hematology-Oncology, Yonsei Cancer Center, Yonsei University Health System, Seoul, South Korea.
2. Department of Nursing, Yonsei University Graduate School, Seoul, South Korea.
3. Palliative Care Center, Yonsei Cancer Center, Yonsei University Health System, Seoul, South Korea.
4. College of Nursing and Brain Korea 21 FOUR Project, Yonsei University, Seoul, South Korea.
5. Department of Pediatrics, Yonsei University College of Medicine, Seoul, South Korea.
6. Division of Medical Oncology, Department of Internal Medicine, Yonsei Cancer Center, Yonsei University College of Medicine, Seoul, South Korea.
7. Department of Internal Medicine, Graduate School of Medical Science, Brain Korea 21 Project, Yonsei University College of Medicine, Seoul, South Korea.
8. Provider Partners Health Plan, Linthicum Heights, Maryland, USA.