Name Info Provider Link
subscription/membership/fee required Atypon https://www.acpjournals.org/doi/10.7326/M18-2478?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub 0pubmed
Dietary Supplements free resource MedlinePlus Health Information https://medlineplus.gov/dietarysupplements.html
subscription/membership/fee required Ovid Technologies, Inc. http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=30959527.ui
free resource PubMed Central https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/30959527/
free resource Europe PubMed Central https://europepmc.org/abstract/MED/30959527