Fig. 1From: Taking the cat-and-mouse game to the next level: different perspectives on the introduction of the German New Psychoactive Substances ActFrequency of use of NPS and other psychoactive substances within the last 12 months. *incl. c-liquids, **incl. ‘bath salts’, ***LSD, DMT, 'magic' mushrooms, ketamine, PCP, etc.Back to article page