text_1: What are the indications for trying to diagnose and/or treat Helicobacter pylori in patients with peptic disease and nonulcer dyspepsia?  What are the indications for testing for Helicobacter pylori, especially by serology?
text_2: What are the indications for trying to diagnose and treat Helicobacter pylori in patients with peptic disease and nonulcer dyspepsia?