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7246232 
Journal Article 
4-Fluoramphetamine in the Netherlands: Text-mining and sentiment analysis of internet forums 
Blankers, M; van Der Gouwe, D; van Laar, M; , 
2019 
English 
30551004 
Users of new psychoactive substances including 4-fluoroamphetamine (4-FA/4-FMP) frequently share their experiences or opinions in online drug forums. We have tested the potential of computerised analysis of drug users' forum posts for monitoring and early detection of trends. Specifically, we tested whether changes in the volume of 4-FA related posts and sentiments expressed in those posts can be observed around the time 4-FA was increasingly reported by Dutch drug monitoring sources (2012-2017).