| Words | Occurrences |
| Authors’ keyword | | Helicobacter-pylori | 5,245 | Gastric cancer | 1,648 | Pylori | 529 | Gastritis | 446 | Eradication | 317 | CagA | 306 | Inflammation | 293 | Clarithromycin | 252 | Children | 232 | Endoscopy | 223 | Epidemiology | 222 | Peptic ulcer | 219 | Antibiotic resistance | 206 | Intestinal metaplasia | 204 | Meta-analysis | 193 | Stomach | 190 | Polymorphism | 180 | Helicobacter | 179 | Helicobacter pylori infection | 177 | Atrophic gastritis | 172 |
| Abstract | | Pylori | 43,231 | Gastric | 29,727 | Patients | 26,944 | Infection | 17,392 | Cancer | 15,470 | Study | 14,285 | Helicobacter | 14,130 | Results | 12,002 | Cells | 10,119 | Risk | 9,185 | Expression | 8,414 | Eradication | 8,247 | Significantly | 7,332 | Treatment | 7,191 | Therapy | 6,918 | Methods | 6,635 | Ci | 6,465 | Analysis | 6,456 | Gastritis | 6,069 | Cell | 5,864 |
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