Name Info Provider Link
free resource Elsevier Science https://linkinghub.elsevier.com/retrieve/pii/S0002-9165(23)23333-X
Folic Acid free resource MedlinePlus Health Information https://medlineplus.gov/folicacid.html
free resource PubMed Central https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/18842806/
free resource Europe PubMed Central https://europepmc.org/abstract/MED/18842806
free resource NCI CPTAC Assay Portal https://assays.cancer.gov/non-CPTAC-3352
subscription/membership/fee required Silverchair Information Systems https://academic.oup.com/ajcn/article-lookup/doi/10.1093/ajcn/88.4.1149