Name Info Provider Link
subscription/membership/fee required Ovid Technologies, Inc. http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=11867353.ui
free resource NCI CPTAC Assay Portal https://assays.cancer.gov/CPTAC-68
subscription/membership/fee required Silverchair Information Systems https://academic.oup.com/aje/article-lookup/doi/10.1093/aje/155.5.420