title: [Peptic ulcer. Negative Helicobacter pylori].
authors.affiliation: Servicio de Gastroenterología, Hospital Angeles del Pedregal, México, DF.
authors.forename: Mario Arturo
authors.initials: MA
authors.lastname: Ballesteros Amozurrutia
mesh_terms: D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000009:adverse effects; D001208:Asia / Q000453:epidemiology; D001315:Australia / Q000453:epidemiology; D005188:False Negative Reactions; D016480:Helicobacter pylori; D006801:Humans; D010437:Peptic Ulcer / Q000139:chemically induced / Q000188:drug therapy* / Q000382:microbiology*; D014481:United States / Q000453:epidemiology
chemical_list: D000894:Anti-Inflammatory Agents, Non-Steroidal