| 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=12960104.ui | |
| free resource | NCI CPTAC Assay Portal | https://assays.cancer.gov/CPTAC-177 | |
| subscription/membership/fee required | Silverchair Information Systems | https://academic.oup.com/endo/article-lookup/doi/10.1210/en.2003-0383 |