Name Info Provider Link
free resource HighWire https://gut.bmj.com/lookup/pmidlookup?view=long&pmid=9014775
Folic Acid free resource MedlinePlus Health Information https://medlineplus.gov/folicacid.html
subscription/membership/fee required Ovid Technologies, Inc. http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=9014775.ui
free resource PubMed Central https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/9014775/
free resource Europe PubMed Central https://europepmc.org/abstract/MED/9014775