Evaluation of an electrochemical sensor and comparison with spectroscopic approaches as used today in practice for harm reduction in a festival setting-A case study: Analysis of 3,4-methylenedioxymethamphetamine samples, Deconinck, Eric, Polet Marie, Canfyn Michael, Duchateau Céline, De Braekeleer Kris, Van Echelpoel Robin, De Wael Karolien, Gremeaux L., Degreef Maarten, and Balcaen Margot , Drug Test Anal, 2023 Dec 12, (2023)