45,386
Participants
Start Date
November 30, 1999
Primary Completion Date
December 31, 2009
Study Completion Date
December 31, 2013
Endoscopy examination with iodine staining
Endoscopy examination with Lugol's iodine staining and questionnaire once time and early treatment on precancerous lesions was undergone for the intervention group.
Cancer Institute/Hospital of Ci County, Handan
Chinese Academy of Medical Sciences
OTHER