AU - Kuehn BM TI - MArijuana use starting in youth linked to iq loss PT - JOUR DP - 2012 TA - JAMA pages = {1196}, VI - 308 IP - 12 AID - 10.1001/2012.jama.12205 [doi] 4100 - http://dx.doi.org/10.1001/2012.jama.12205 SO - JAMA September 26, 2012 308(12):1196