title: Evolving challenges of Helicobacter pylori.
authors: R
authors: R
authors: Pellicano
authors: M
authors: M
authors: Rizzetto
authors: D Y
authors: DY
authors: Graham
mesh_terms: D016481:Helicobacter Infections / Q000150:complications / Q000266:history; D016480:Helicobacter pylori; D049673:History, 20th Century; D006801:Humans