Cost-Effectiveness of Classroom-Based Cognitive Behaviour Therapy in Reducing Symptoms of Depression in Adolescents: A Trial-Based Analysis - Anderson, Rob; Ukoumunne, Obioha C.; Sayal, Kapil; Phillips, Rhiannon; Taylor, John A.; Spears, Melissa; Araya, Ricardo; Lewis, Glyn; Millings, Abigail; Montgomery, Alan A.; Stallard, Paul (Journal of Child Psychology and Psychiatry, 2014)