RT Journal
T1 Incorrect frequency of marijuana use reported in: Teen marijuana use on the rise
JF JAMA
JO JAMA
YR 2011
FD July 13
VO 306
IS 2
SP 162
OP 162
DO 10.1001/jama.2011.951
UL http://dx.doi.org/10.1001/jama.2011.951
AB 
Incorrect Frequency of Marijuana Use Reported:  In the Medical News & Perspectives article entitled “Teen Marijuana Use on the Rise,” published in the January 19, 2011, issue of JAMA (2011;305[3]:242), the first sentence of the third paragraph should read “Marijuana use increased across all 3 grades, continuing a 3-year trend, with 6.1% of 12th graders reporting daily or near-daily use in the past 30 days compared with 5.2% in 2009; 3.3% of 10th graders vs 2.8% in 2009; and 1.2% of eighth graders vs 1.0% in 2009.” This article was corrected for errors online on June 7, 2011.