Correction: Article on Folic Acid Fortification and the Risk of CIN Free

In the article on folic acid fortification and the risk of CIN in the July 2009 issue of Cancer Prevention Research (1). There are two incorrect symbols in Table 3. The reference group (n = 44) for folate and vitamin B12 combination should be women with ≤19.8 ng/mL, vitamin B12 < 200.6 pg/mL (n = 44) and n = 279 group should be women with folate ≤ 19.8 ng/mL, vitamin B12 ≥ 200.6 pg/mL.