Table 1.

Curated search strategies for chosen databases.

Data base	Search strategy	Results
Pubmed	(“Gastrointestinal Microbiome”[MeSH Terms] OR “Gut Microbiome”[Title/Abstract] OR “Gut Microbiomes”[Title/Abstract] OR “Gut Microflora”[Title/Abstract] OR “Gut Microbiota”[Title/Abstract] OR “Gut Microbiotas”[Title/Abstract] OR “Gut Flora”[Title/Abstract]) AND (“Stomach Neoplasms”[MeSH Terms] OR “Stomach Neoplasms”[Title/Abstract] OR “Stomach Neoplasm”[Title/Abstract] OR “Gastric Neoplasms”[Title/Abstract] OR “Gastric Neoplasm”[Title/Abstract] OR “Stomach Cancers”[Title/Abstract] OR “Gastric Cancer”[Title/Abstract] OR “Gastric Cancers”[Title/Abstract] OR “Stomach Cancer”[Title/Abstract])	259
WOS	#1 TS = (“Gut Microbiotas”) OR TS = (“Gastrointestinal Microbiome”) OR TS = (“Gut Microbiome”) OR TS = (“Gut Microflora”) Results 3,632 2# TS = (“Gastric Neoplasm”) OR TS = (“Gastric Cancer”) OR TS = (“Stomach cancer”) OR TS = (“Stomach Neoplasms”) Results 102,679	21
Scopus	(TITLE-ABS-KEY (“Gut Microbiotas”) OR TITLE-ABS-KEY (“Gastrointestinal Microbiome”) OR TITLE-ABS-KEY (“Gut Microbiome”) OR TITLE-ABS-KEY (“Gut Microflora”)) AND (TITLE-ABS-KEY (“Stomach Neoplasms”) OR TITLE-ABS-KEY (“Gastric Neoplasm”) OR TITLE-ABS-KEY (“Gastric Cancers”) OR TITLE-ABS-KEY (“Stomach cancers”) OR TITLE-ABS-KEY (“Gut Flora”) OR TITLE-ABS-KEY (“Stomach Neoplasms”))	845
Total		1,125