Name	Info	Provider	Link
Tears	free resource	MedlinePlus Health Information	https://medlineplus.gov/tears.html
	subscription/membership/fee required	Ovid Technologies, Inc.	http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=31007216.ui
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/31007216/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/31007216
	free resource	NCI CPTAC Assay Portal	https://assays.cancer.gov/non-CPTAC-1112
	free resource	Wolters Kluwer	https://doi.org/10.4103/ijo.IJO_1278_18