Odsbu I, Mahic M, Skurtveit S, Lund I-O, Handal M. An 11-year nationwide registry-linkage study of opioid maintenance treatment in pregnancy in Norway. Nor J Epidemiol [Internet]. 2021Aug.16 [cited 2024Nov.21];29(1-2). Available from: https://www.ntnu.no/ojs/index.php/norepid/article/view/4047