| Name | Info | Provider | Link |
|---|---|---|---|
| Emergency Medical Services | free resource | MedlinePlus Health Information | https://medlineplus.gov/emergencymedicalservices.html |
| subscription/membership/fee required | Ovid Technologies, Inc. | http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=32721010.ui | |
| subscription/membership/fee required | Silverchair Information Systems | https://jamanetwork.com/journals/jama/fullarticle/10.1001/jama.2020.2580 |