Name Info Provider Link
subscription/membership/fee required Ingenta plc https://www.ingentaconnect.com/openurl?genre=article&issn=&volume=17&issue=5&spage=604&aulast=Lee
COVID-19 Vaccines free resource MedlinePlus Health Information https://medlineplus.gov/covid19vaccines.html
subscription/membership/fee required Ovid Technologies, Inc. http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=37643050.ui
subscription/membership/fee required Wolters Kluwer https://doi.org/10.1097/ICB.0000000000001248