The Cannabis Youth Treatment (CYT) experiment: rationale, study design and analysis plans. - Dennis,M.; Titus,JC.; Diamond,G.; Donaldson,J.; Godley,SH.; Tims,FM.; Webb,C.; Kaminer,Y.; Babor,T.; Roebuck,SH.; Godley,MD.; Hamilton,N.; et al. (Addiction, 2002)