1.
HÃ¥berg SE, Ebbing M, Stoltenberg C. Nasjonale registerkilder i epidemiologisk forskning. Nor J Epidemiol [Internet]. 2017Oct.26 [cited 2024Nov.25];27(1-2). Available from: https://www.ntnu.no/ojs/index.php/norepid/article/view/2403