Table 3. List of publically available datasets used in this study.

GEO dataset	First author	Conditions	Study type	GEO link	Publication link
GSE68376	Bruttger	Microglia versus CNS engrafting bone marrow–derived macrophages (beMφs)	RNA sequencing	http://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSE68376	http://www.ncbi.nlm.nih.gov/pubmed/26163371
GSE15907	ImmGen	Microglia versus peripheral immune cells for signature validation	Affymetrix Array	http://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSE15907	Multiple, see citations on GEO page
GSE63340	Lavin	Comparison of microglia to peripheral macrophages/monocytes for generation of signatures	RNA sequencing	http://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSE63340	http://www.ncbi.nlm.nih.gov/pubmed/25480296
GSE75246	Srinivasan	LPS-treated and control neurons/astrocytes/microglia	RNA sequencing	https://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSE75246	https://www.ncbi.nlm.nih.gov/pubmed/27097852
GSE99078	Takata	iMac versus BM Mac	RNA sequencing	https://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSE99078	https://www.ncbi.nlm.nih.gov/pubmed/28723550