| Name | Info | Provider | Link |
|---|---|---|---|
| subscription/membership/fee required | Elsevier Science | https://linkinghub.elsevier.com/retrieve/pii/S1878-8750(20)31598-9 | |
| Birthmarks | free resource | MedlinePlus Health Information | https://medlineplus.gov/birthmarks.html |
| free resource | NCI CPTC Antibody Characterization Program | https://antibodies.cancer.gov/detail/CPTC-NT5E-1 |