title: Peptic puzzles.
authors.affiliation: Department of Veterans Affairs Medical Center, Milwaukee, Wisconsin 53295, USA.
authors.forename: A
authors.initials: A
authors.lastname: Sonnenberg
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D015331:Cohort Studies; D004381:Duodenal Ulcer / Q000382:microbiology*; D005260:Female; D016481:Helicobacter Infections; D016480:Helicobacter pylori / Q000502:physiology*; D006801:Humans; D008223:Lymphoma / Q000382:microbiology; D008297:Male; D008875:Middle Aged; D012307:Risk Factors; D013274:Stomach Neoplasms / Q000382:microbiology; D013276:Stomach Ulcer / Q000382:microbiology*