Bukten, A., Skurtveit, S., Gossop, M., Waal, H., Stangeland, P. and Clausen, T. 2011. The influence of programme differences on crime reduction in opioid maintenance treatment. An analysis of regional patterns in Norway. Norsk Epidemiologi. 21, 1 (Dec. 2011). DOI:https://doi.org/10.5324/nje.v21i1.1432.