Baggio, Stéphanie, Joseph Studer, Meichun Mohler-Kuo, Jean-Bernard Daeppen, and Gerhard Gmel. “Profiles of Drug Users in Switzerland and Effects of early-Onset Intensive Use of Alcohol, Tobacco and cannabis on other Illicit Drug Use”. Swiss Medical Weekly 143, no. 2324 (June 2, 2013): w13805. Accessed October 13, 2024. https://smw.ch/index.php/smw/article/view/1701.