title: Helicobacter pylori: controversial and unsolved issues.
authors.affiliation: Academic Medical Centre, Department of Gastroenterology-Hepatology, Amsterdam Zuidoost.
authors.forename: G N
authors.initials: GN
authors.lastname: Tytgat
authors.forename: I N
authors.initials: IN
authors.lastname: Marks
mesh_terms: D004381:Duodenal Ulcer / Q000382:microbiology; D005764:Gastroesophageal Reflux / Q000382:microbiology; D016481:Helicobacter Infections / Q000382:microbiology*; D016480:Helicobacter pylori / Q000472:pathogenicity*; D006801:Humans