Name Info Provider Link
subscription/membership/fee required Ovid Technologies, Inc. http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=30332386.ui
free resource NCI CPTAC Assay Portal https://assays.cancer.gov/non-CPTAC-3321
subscription/membership/fee required De Gruyter https://www.degruyter.com/document/doi/10.1515/cclm-2018-0566