RT Journal Article SR Electronic T1 Exposure to diagnostic levels of radiation prior to age 30 increases the risk of breast cancer in BRCA1/2 carriers JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP e40 OP e40 DO 10.1136/eb-2012-101075 VO 18 IS 4 A1 Bruce G Haffty A1 Carol Lee YR 2013 UL http://ebm.bmj.com/content/18/4/e40.abstract AB