| Name | Info | Provider | Link |
|---|---|---|---|
| Potassium | free resource | MedlinePlus Health Information | https://medlineplus.gov/potassium.html |
| subscription/membership/fee required | Ovid Technologies, Inc. | http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=34251427.ui | |
| subscription/membership/fee required | Silverchair Information Systems | https://jamanetwork.com/journals/jamainternalmedicine/fullarticle/10.1001/jamainternmed.2021.3053 |