title: Risk factors in patients with refractory peptic ulcer.
authors.forename: S
authors.initials: S
authors.lastname: Massarrat
mesh_terms: D000897:Anti-Ulcer Agents / Q000627:therapeutic use; D006801:Humans; D010437:Peptic Ulcer / Q000188:drug therapy*; D012107:Research Design; D012307:Risk Factors
chemical_list: D000897:Anti-Ulcer Agents