Odsbu, Ingvild, Milada Mahic, Svetlana Skurtveit, Ingunn-Olea Lund, and Marte Handal. 2021. “An 11-Year Nationwide Registry-Linkage Study of Opioid Maintenance Treatment in Pregnancy in Norway”. Norsk Epidemiologi 29 (1-2). https://doi.org/10.5324/nje.v29i1-2.4047.