Cancer risk in children with birth defects and in their families: a population based cohort study of 5.2 million children from Norway and Sweden

Bjorge T, Cnattingius S, Lie RT, Tretli S, Engeland A. Cancer risk in children with birth defects and in their families: a population based cohort study of 5.2 million children from Norway and Sweden. Cancer Epidemiol Biomarkers Prev 2008; 17(3):500-506.