The Cannabis Youth Treatment (CYT) Study: Main findings from two randomized trials. - Dennis,M.; Godley,S.H.; Diamond,G.; Tims,F.M.; Babor,T.; Donaldson,J.; Liddle,H.; Titus,J.C.; Kaminer,Y.; Webb,C.; Hamilton,N.; Funk,R. (J Subst Abuse Treat, 2004)