Effectiveness of usual-care cognitive-behavioral therapy for adolescents with depressive disorders rated by parents and patients – an observational study oleh Daniel Walter, Jana Buschsieweke, Lydia Dachs, Hildegard Goletz, Anja Goertz-Dorten, Claudia Kinnen, Daniela Perri, Christiane Rademacher, Stephanie Schuermann, Paula Viefhaus, Katrin Woitecki, Tanja Wolff Metternich-Kaizman, Elena von Wirth, Manfred Doepfner