Name Info Provider Link
subscription/membership/fee required Ovid Technologies, Inc. http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=22706248.ui
subscription/membership/fee required De Gruyter https://www.degruyter.com/document/doi/10.1515/cclm-2011-0950
free resource Biospecimen Research Database https://brd.nci.nih.gov/brd/paper/clin-chem-lab-med/2012/lack-of-consistency-between-two-commercial-elisas-and-against/11712