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