Table 1.

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