Name Info Provider Link
free resource JMIR Publications https://mhealth.jmir.org/2020/3/e14768/
Chronic Pain free resource MedlinePlus Health Information https://medlineplus.gov/chronicpain.html
free resource PubMed Central https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/32224487/
free resource Europe PubMed Central https://europepmc.org/abstract/MED/32224487