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.
The flow chart of the study subjects screening process. H. pylori: Helicobacter pylori; 14C-UBT: 14C urease breath test; H. pylori (+): Helicobacter pylori-positive; H. pylori (-): Helicobacter pylori-negative (detailed data shown in Table 1).
