To verify whether the gaming interventions has been delivered as designed (intervention fidelity), patients' gaming logs will be analysed (gaming frequency [number of gaming sessions per week], the length of each session [minutes], a number of drop-outs). Further, patients gaming diaries including qualitative data will be analysed and linked with fidelity information and focus-group interviews (10 in each intervention group), to describe the strengths and possible limitations of the gaming interventions.