Conditions: Colorectal Adenoma
Interventions: Device: standard second examination of the sigmoid colon; Device: transparent cap-assisted second examination of the sigmoid colon
Sponsors: Fudan University
Not yet recruiting Conditions: Colorectal Adenoma
Interventions: Device: standard second examination of the sigmoid colon; Device: transparent cap-assisted second examination of the sigmoid colon
Sponsors: Fudan University
Not yet recruiting