Low folate levels may protect against colorectal cancer.
van Guelpen, B.; Hultdin, J.; Johansson, I.; Hallmans, G.; Stenling, R.; Riboli, E.; Winkvist, A.; Palmqvist, R.; Gut, 2006, vol. 55, issue 10, p 1461, ISSN 00175749. ISBN 14683288.

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