| Name | Info | Provider | Link |
|---|---|---|---|
| free resource | Elsevier Science | https://linkinghub.elsevier.com/retrieve/pii/S0376-8716(21)00619-0 | |
| HIV | free resource | MedlinePlus Health Information | https://medlineplus.gov/hiv.html |
| free resource | PubMed Central | https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/34781096/ | |
| free resource | Europe PubMed Central | https://europepmc.org/abstract/MED/34781096 |