1. Department of Family Medicine; Hallym University Chuncheon Sacred Heart Hospital; Chuncheon South Korea
2. Family Medicine; Graduate School of Korea University College of Medicine; Seoul South Korea
3. Department of Family Medicine; Seoul National University Hospital; Seoul South Korea
4. National Cancer Control Institute; National Cancer Center; South Korea
5. Gangwon National Cancer Center & Department of Health Management; School of Medicine, Kangwon National University; South Korea
6. Department of Preventive Medicine; Chonnam National University Medical School; South Korea
7. Gyeongnam Regional Cancer Center, School of Medicine; Gyeongsang National University; South Korea
8. Mental Health Clinic; National Cancer Center; Goyang South Korea