| Name | Info | Provider | Link |
|---|---|---|---|
| free resource | JMIR Publications | https://www.jmir.org/2004/1/e6/ | |
| Cold Sores | free resource | MedlinePlus Health Information | https://medlineplus.gov/coldsores.html |
| free resource | PubMed Central | https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/15111272/ | |
| free resource | Europe PubMed Central | https://europepmc.org/abstract/MED/15111272 |