Using wastewater-based analysis to monitor the effects of legalized retail sales on cannabis consumption in Washington State, USA - Burgard, D. A.; Williams, J.; Westerman, D.; Rushing, R.; Carpenter, R.; LaRock, A.; Sadetsky, J.; Clarke, J.; Fryhle, H.; Pellman, M.; Banta-Green, C. J. (Addiction (Abingdon, England), 2019)