Extended treatment of multimodal cognitive behavioral therapy in children and adolescents with obsessive–compulsive disorder improves symptom reduction: a within-subject design. - Adam, Julia; Goletz, Hildegard; Dengs, Stefanie; Klingenberger, Nora; Könnecke, Sonja; Vonderbank, Christina; Hautmann, Christopher; Hellmich, Martin; Plück, Julia; Döpfner, Manfred (Child & Adolescent Psychiatry & Mental Health, 2022)