Cancer Screening Assessment and Mana-gement Division;
Research Center for Cancer Prevention and Screening;
National Cancer Center;
Cancer Registry Section;
Niigata Cancer Center Hospital;
Division of Gastroenterology;
Niigata Cancer Center Hospital;
Graduate student;
Department of Health Mana-gement;
Keio University;
Committee of Gastroin-testinal Cancer Screening;
Niigata city Medical Association;
Niigata city Public Health Center;
Niigata city Government;