[Helicobacter pylori status--how, when and in whom?].
D016481:Helicobacter Infections / Q000175:diagnosis; D016480:Helicobacter pylori / Q000302:isolation & purification; D006801:Humans; D013276:Stomach Ulcer / Q000175:diagnosis / Q000382:microbiology*
Helicobacter pylori-status--hvordan, hvornår og hos hvem?