Search strategy used in PubMed
| Number | Search terms |
| 1 | “helicobacter pylori”[MeSH Terms] |
| 2 | “helicobacter nemestrinae”[Title/Abstract] |
| 3 | “helicobacter infections”[Title/Abstract] |
| 4 | “Helicobacter”[Title/Abstract] |
| 5 | “pylori”[Title/Abstract] |
| 6 | “H.Pylori”[Title/Abstract] |
| 7 | “Campylobacter”[Title/Abstract] |
| 8 | “campylobacter pylori”[Title/Abstract] |
| 9 | 1 or 2–9 |
| 10 | “gastritis, atrophic”[MeSH Terms] |
| 11 | “atrophic gastritides”[Title/Abstract] |
| 12 | “atrophic gastritis”[Title/Abstract] |
| 13 | 10 or 11–12 |
| 14 | “GastroPanel”[Title/Abstract] |
| 15 | “serum biomarkers”[Title/Abstract] |
| 16 | “panels”[Title/Abstract] |
| 17 | “pepsinogens”[MeSH Terms] |
| 18 | “pepsinogen i”[Title/Abstract] |
| 19 | “pepsinogen ii”[Title/Abstract] |
| 20 | “pepsinogen i ii”[Title/Abstract] |
| 21 | “Gastrin-17”[Title/Abstract] |
| 22 | “helicobacter pylori antibodies”[Title/Abstract] |
| 23 | 14 or 15–22 |
| 24 | 9 and 13 and 23 |