Name Info Provider Link
H1N1 Flu (Swine Flu) free resource MedlinePlus Health Information https://medlineplus.gov/h1n1fluswineflu.html
subscription/membership/fee required Ovid Technologies, Inc. http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=20453611.ui
subscription/membership/fee required Wolters Kluwer https://doi.org/10.1097/PCC.0b013e3181dac698