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2 AJ Wright , JR Dainty & PM Finglas (2007) Folic acid metabolism in humans revisited: potential implications for proposed mandatory folic acid fortification in the UK. Brit J Nutr .
6 VM Whitehead , BA Kamen & D Beaulieu (1987) Levels of dihydrofolate reductase in livers of birds, animals, primates and man. Cancer Drug Delivery 4, 185–189.
8 K Radimer , B Bindwald , J Hughes , B Ervin , C Swanson & MF Picciano (2004) Dietary supplement use by US adults: data from the National Health and Nutrition Examination Survey, 1999-2000. Am J Epidemiol 160, 339–349.
12 MR Sweeney , J McPartlin & J Scott (2007) Folic acid fortification and public health: Report on threshold doses above which unmetabolised folic acid appears in serum. BMC Public Health 7, 41–47.
13 EH Reynolds (2002) Benefits and risks of folic acid to the nervous system. J Neurol Neurosurg Psychiat 72, 567–571.
17 B Van Guelpen , J Hultdin , I Johansson , G Hallmans , R Stenling , E Riboli , A Winkvist & R Palmqvist (2006) Low folate levels may protect against colorectal cancer. Gut 55, 1461–1466.
19 BF Cole , JA Baron , RS Sandler , (2007) Folic acid for the prevention of colorectal adenomas: a randomised clinical trial. JAMA 297, 2351–2359.