| Name | Info | Provider | Link |
|---|---|---|---|
| Tears | free resource | MedlinePlus Health Information | https://medlineplus.gov/tears.html |
| free resource | NCI CPTAC Assay Portal | https://assays.cancer.gov/CPTAC-660 | |
| subscription/membership/fee required | Silverchair Information Systems | https://pubs.aip.org/aip/rsi/article-lookup/doi/10.1063/5.0207182 |