Table 1.

Electric search strategy in GEO.

Database	GEO
Disease	Periodontitis	Type 2 diabetes mellitus
Search Term	[(“Periodontitis” (MeSH Terms) AND “Homosapiens”(porgn: txid9606)]	[(“diabetes mellitus, type 2”(MeSH Terms) OR type 2 diabetes (All Fields)] AND [“pancreas” (MeSH Terms) OR pancreatic (All Fields)] AND [“tissues”(MeSH Terms) OR tissue (All Fields)] AND “Homo sapiens”(porgn) AND [“gds”(Filter) AND “Expression profiling by array”(Filter)].
Filter	Expression profiling by array Human	Expression profiling by array Human
Results	19	4