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In the Research Letter by Cohen et al,1 “Caffeine Content of Dietary Supplements Consumed on Military Bases,” the supplement sample included the most popular dietary supplements sold as powders and tablets in addition to those sold as capsules. This article was corrected online.
Error in Supplement Sample Description. JAMA Intern Med. 2016;176(4):568. doi:10.1001/jamainternmed.2016.0990