| Name | Info | Provider | Link |
|---|---|---|---|
| Pain | free resource | MedlinePlus Health Information | https://medlineplus.gov/pain.html |
| free resource | PubMed Central | https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/30809770/ | |
| subscription/membership/fee required | Springer | https://dx.doi.org/10.1007/s12529-019-09776-5 | |
| free resource | Europe PubMed Central | https://europepmc.org/abstract/MED/30809770 |