What to do when the unwanted happens? Negative event management in studies on internet- and mobile-based interventions for youths and adults with two case reports.

"Declaration of competing interest ACZ reports having received fees for lectures or workshops and for expert videos for an internet-based intervention for sexual dysfunction. IT reports having received fees for lectures/workshops in the e-mental-health context from training institutes and congresses for psychotherapists, but outside the submitted work. She was the project lead for the research project ImpleMentAll (funded by the European Commission) at GET.ON which aimed to investigate the effectiveness of tailored implementation strategies compared to implementation as usual for guided IMIs (11/2017–03/2021). HB received consultancy fees, reimbursement of congress attendance, and travel costs as well as payments for lectures from Psychotherapy and Psychiatry Associations as well as Psychotherapy Training Institutes in the context of E-Mental-Health topics. He has been the beneficiary of study support (third-party funding) from several public funding organizations. LBS received personal fees from Psychotherapy and Psychiatry Associations and Psychotherapy Training Institutes, including reimbursement of travel costs and payment for lectures in the context of E-Mental-Health but outside the submitted work. ChS, CeS, TS, and LS have no conflicts of interest to declare."

"Funding sources PSYCHOnlineTHERAPY was supported by the Innovation Committee (Innovationsausschuss) of the Joint Federal Committee (Gemeinsamer Bundesausschuss, gBA) [no: 01NVF18036]. The feasibility study is part of the BESTFORCAN project and was supported by the 10.13039/501100002347Federal Ministry of Education and Research [no: 01KR1804D]."