1. Statistics Koreahttp://kostat.go.kr/portal/korea/kor_nw/1/6/1/index.board?bmode=read&aSeq=370710&pageNo=&rowNum=10&amSeq=&sTarget=&sTxt=.
2. Overview of the National Cancer screening programme and the cancer screening status in Korea;Kim;Asian Pac. J. Cancer Prev.,2011
3. Ulleung-gunhttp://www.ulleung.go.kr.
4. Statistics Koreahttp://kosis.kr/statHtml/statHtml.do?orgId=101&tblId=DT_1B040A3&conn_path=I2.
5. Ministry of Health and Welfarehttp://kosis.kr/statHtml/statHtml.do?orgId=117&tblId=DT_117N_A11109&conn_path=I2.