| Name | Info | Provider | Link |
|---|---|---|---|
| Vitamin D Deficiency | free resource | MedlinePlus Health Information | https://medlineplus.gov/vitaminddeficiency.html |
| subscription/membership/fee required | Springer | https://dx.doi.org/10.1007/s11695-019-03963-9 | |
| free resource | NCI CPTC Antibody Characterization Program | https://antibodies.cancer.gov/detail/CPTC-PGR-1 |