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Correction
April 3, 2002

Incorrect Measure

JAMA. 2002;287(13):1651. doi:10.1001/jama.287.13.1651

In the Original Contribution entitled "Cognitive Functioning of Long-term Heavy Cannabis Users Seeking Treatment" published in the March 6, 2002, issue of THE JOURNAL (2002;287:1123-1131), the legend for the Figure should indicate that error bars represent SEM, not SD.

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