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Synthetic cannabinoid-related emergency department (ED) visit trends, New York City, January 2012 through May 2016. The periods highlighted with arrows indicate the initial detection of increases in cannabinoid-related ED visits (December 2013 to June 2014) and subsequent decreases in cannabinoid-related ED visits (July 2015–March 2016) after an intervention that included removal of synthetic cannabinoid products through a multiagency response.
