In the article titled “Medical Cannabis Laws and Opioid Analgesic Overdose Mortality in the United States, 1999-2010,” published online August 25 and also in the October print issue of JAMA Internal Medicine (doi:10.1001/jamainternmed.2014.4005), an incorrect term was used in the Discussion section. In the second paragraph, the first sentence should have read as follows: “Approximately 60% of all opioid analgesic overdoses occur among patients who have legitimate prescriptions from a single provider.26” This article was corrected online and in print.