Name Info Provider Link
free resource HighWire http://sti.bmj.com/lookup/pmidlookup?view=long&pmid=34548415
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=34548415.ui
free resource PubMed Central https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/34548415/
free resource Europe PubMed Central https://europepmc.org/abstract/MED/34548415