Design
We conducted a multicenter randomized controlled trial (RCT) with two conditions. The intervention group received a CBT-based online self-help training to reduce FCR. Both the intervention group and the control group received care as usual (CAU), standard care in their own hospital.The original sample size calculation mentioned in the study protocol does not apply for the statistical analyses in the current study [Participants were assessed through online self-report questionnaires at baseline (T0), three months (T1; after intervention), nine months (T2), 15 months (T3), and 24 months (T4). More details on the study design are described in the study protocol [