id	domain	url
crl-15716	www.pubmedcentral.gov	www.pubmedcentral.gov/articlerender
crl-15716	www.nlm.nih.gov	www.nlm.nih.gov/pubs/factsheets/errata.html
crl-15716	www.library.yale.edu	www.library.yale.edu/~llicense/listarchives/
crl-15716	www.elsevier.com	www.elsevier.com/homepage/about/ita/editors/newsitems/withdrawl_policy.htm
crl-15716	www.elsevier.com	www.elsevier.com/wps/find/librariansinfo.librarians/libr_policies#removal