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Liakoni, Evangelia; Schaub, Michael P; Maier, Larissa J; Glauser, Gaëlle-Vanessa; Liechti, Matthias E (2015). The Use of Prescription Drugs, Recreational Drugs, and "Soft Enhancers" for Cognitive Enhancement among Swiss Secondary School Students. PLoS ONE, 10(10), e0141289. Public Library of Science 10.1371/journal.pone.0141289
