1. Department of Preventive Medicine, Seoul National University College of Medicine, Korea. suepark@snu.ac.kr, dhkang@snu.ac.kr, kyyoo@snu.ac.kr
2. Cancer Research Institute, Seoul National University, Korea.
3. Institute of Health Policy and Management, Seoul National University, Korea.
4. WCU, Korea.
5. Cancer Early Detection Branch, National Cancer Control Institute, National Cancer Center, Korea. yeonju@ncc.re.kr