| Name | Info | Provider | Link |
|---|---|---|---|
| free resource | GlyGen glycoinformatics resource | https://glygen.org/publication/PubMed/34169423/ | |
| Erectile Dysfunction | free resource | MedlinePlus Health Information | https://medlineplus.gov/erectiledysfunction.html |
| subscription/membership/fee required | Springer | https://doi.org/10.1007/s11596-021-2380-8 |