1. Department of Cancer Control and Population Health, National Cancer Center Graduate School of Cancer Science and Policy, Goyang, Korea
2. Regional Hospital Garoua, Ministry of Public Health, Garoua, Republic of Cameroon
3. Department of Cancer Biomedical Science, National Cancer Center Graduate School of Cancer Science and Policy
4. Cancer Epidemiology Branch, Division of Cancer Epidemiology and Prevention, Research Institute, National Cancer Center
5. Department of Family Medicine and Center for Cancer Prevention and Detection, Hospital, National Cancer Center, Goyang, Korea
6. School of Public Health, Mongolian National University of Medical Sciences, Ulaanbaatar, Mongolia