Data management and quality assurance
RA
After inclusion, participants receive a unique, coded participant number that contains no identifiable information. All data are collected digitally whenever possible, using Castor EDC, and de-identified using this coded number. An administrative database will be used to ensure timely assessments. Participants who discontinue their treatment or deviate from the study protocol are encouraged to continue the research assessments to minimize loss of follow-up data. Once collected, de-identified data are backed up periodically and centrally stored and managed by the data management team of the Amsterdam UMC. Data will be stored 15 years upon completion of the study and will be destroyed after this time. The video recordings and/or audio recordings of the TFT sessions are securely stored at the digital network of the mental health organization where the participant receives treatment. The recordings will be destroyed one year upon completion of the study. The study is guided by the study team, which also acts as the steering committee. The study team consists of the PI, co-principal investigators, junior researchers, RA’s, and site investigators (Additional file 