Besson, Jacques, Thilo Beck, Gerhard A. Wiesbeck, Robert Hämmig, André Kuntz, Sami Abid, and Rudolf Stohler. “Opioid Maintenance Therapy in Switzerland: An overview of the Swiss IMPROVE Study”. Swiss Medical Weekly 144, no. 1314 (March 23, 2014): w13933. Accessed November 25, 2024. https://smw.ch/index.php/smw/article/view/1850.