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free resource Atypon https://journals.sagepub.com/doi/abs/10.1177/1535370220978372?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub 0pubmed
COVID-19 (Coronavirus Disease 2019) free resource MedlinePlus Health Information https://medlineplus.gov/covid19coronavirusdisease2019.html
subscription/membership/fee required Ovid Technologies, Inc. http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=33302737.ui
free resource PubMed Central https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/33302737/
free resource Europe PubMed Central https://europepmc.org/abstract/MED/33302737
free resource NCI CPTAC Assay Portal https://assays.cancer.gov/CPTAC-438