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Article History

Received: 11 September 2019

Accepted: 30 December 2019

First Online: 12 March 2020

Ethics approval and consent to participate

: The study will be conducted in accordance with the principles of Good Clinical Practice, the Declaration of Helsinki (), and current ethical standards. Written informed consent is obtained from each participant. Depending on the age of the participant, informed consent from the legal representative or guardian will also be required. The central ethical approval of the Ethics Committee of Ulm University was obtained (request number 292/18).The COACH consortium will be advised by an external Data and Safety Monitoring Board (DSMB) consisting of three researchers in their areas of expertise: Prof. Dr. Christine Knaevelsrud (CS), Free University of Berlin; PD Dr. Levente Kriston (LK), University Hospital Hamburg-Eppendorf; Prof. Dr. Claus Peter Schmitt (CPS), Heidelberg University Hospital.There are no known risks or side effects of Internet- and mobile-based interventions to reduce depressive symptoms in adults []. However, in case of unexpected (serious) adverse events with inevitable protocol modifications during the conduction of the trial, the necessary changes will be notified to the Ethics Committee of Ulm University and the DSMB.

: Not applicable.

: HB is a consultant for different insurance companies, health care associations, and psychotherapy chambers and gives talks and workshops and conducts a third party-funded project on iCBT and the dissemination and implementation of iCBT. The remaining authors declare that they have no competing interests.