Department of Pharmacoepidemiology;
Graduate School of Medicine and Public Health;
Kyoto University;
Kyoto;
Japan;
Center for Innovative Clinical Medicine;
Okayama University Hospital;
Okayama;
Japan;
Cancer Screening Technology Division;
Research Center for Cancer Prevention and Screening;
National Cancer Center;
Tokyo;
Japan;
Department of Radiology;
Jichi Medical University;
Tochigi;
Japan;
Division of Drug Development and Regulatory Science;
Faculty of Pharmacy;
Keio University;
Tokyo;
Japan;
Colorectal; Cancer; Screening; Diagnostic; Test; iFOBT; Optical; Colonoscopy; Barium; Enema;