Fig. 1.
Trends in the use of upper gastrointestinal (UGI) series and endoscopy among participants in the National Cancer Screening Program in Korea from 2002 to 2011.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.