Name Info Provider Link
subscription/membership/fee required Atypon https://journals.sagepub.com/doi/10.1177/2168479018807677?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub 0pubmed
Acne free resource MedlinePlus Health Information https://medlineplus.gov/acne.html
subscription/membership/fee required Springer https://doi.org/10.1177/2168479018807677