1. Supportive Care Center, Samsung Comprehensive Cancer Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
2. Department of Clinical Research Design & Evaluation, Samsung Advanced Institute for Health Science & Technology (SAIHST), Sungkyunkwan University, Seoul, Korea.
3. Division of Cancer Registration and Surveillance, National Cancer Control Institute, National Cancer Center, Goyang, Korea.
4. Korea Central Cancer Registry, National Cancer Center, Goyang, Korea.
5. Department of Obstetrics and Gynecology, Hanyang University, Seoul, Korea.