Bachs LC, Bramness JG, Engeland A, Skurtveit S. Repeated dispensing of codeine is associated with high consumption of benzodiazepines. Nor J Epidemiol [Internet]. 2009Sep.28 [cited 2024May2];18(2). Available from: https://www.ntnu.no/ojs/index.php/norepid/article/view/33