Name Info Provider Link
free resource Elsevier Science https://linkinghub.elsevier.com/retrieve/pii/S0002-9165(23)29349-1
Folic Acid free resource MedlinePlus Health Information https://medlineplus.gov/folicacid.html
subscription/membership/fee required Silverchair Information Systems https://academic.oup.com/ajcn/article-lookup/doi/10.1093/ajcn.83.3.701