Name Info Provider Link
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=34405801.ui
subscription/membership/fee required Silverchair Information Systems https://research.aota.org/ajot/article-lookup/doi/10.5014/ajot.2021.049195