TI - Incorrect frequency of marijuana use reported in: Teen marijuana use on the rise PT - JOUR DP - 2011 TA - JAMA pages = {162}, VI - 306 IP - 2 AID - 10.1001/jama.2011.951 [doi] 4100 - http://dx.doi.org/10.1001/jama.2011.951 SO - JAMA July 13, 2011 306(2):162