1. Huntington University, Huntington, USA.
2. Loma Linda University School of Medicine, Loma Linda, CA, USA (Present).
3. Department of Family Medicine, Healthcare System Gangnam Center, Seoul National University Hospital, Seoul, Korea.
4. Department of Cancer Control and Policy, Graduate School of Cancer Science and Policy, Goyang, Korea.
5. Department of Family Medicine and Center for Cancer Prevention and Detection, National Cancer Center, Goyang, Korea.