RT Journal Article SR Electronic T1 Long term dietary folate decreased risk of colon cancer in women JF Evidence Based Nursing JO Evid Based Nurs FD BMJ Publishing Group Ltd and RCN Publishing Company Ltd SP 55 OP 55 DO 10.1136/ebn.2.2.55 VO 2 IS 2 YR 1999 UL http://ebn.bmj.com/content/2/2/55.abstract AB