1. The Korea Central Cancer Registry, Division of Cancer Registration and Surveillance, National Cancer Center, Goyang, Korea.
2. Hematologic Oncology Clinic, National Cancer Center, Goyang, Korea.
3. Department of Cancer Control and Policy, National Cancer Center, Goyang, Korea.
4. Center for Pediatric Oncology, National Cancer Center, Goyang, Korea.
5. Department of System Cancer Science, Graduate School of Cancer Science and Policy, National Cancer Center, Goyang, Korea.