Lie, Rolv T., and Rolv Skjærven. “Follow-up Studies of Children With Birth Defects in the Medical Birth Registry of Norway: A Review”. Norsk Epidemiologi 15, no. 1 (October 13, 2009). Accessed April 28, 2024. https://www.ntnu.no/ojs/index.php/norepid/article/view/222.