Effectiveness and cost-effectiveness of guided internet- and mobile-based CBT for adolescents and young adults with chronic somatic conditions and comorbid depression and anxiety symptoms (youthCOACHCD): study protocol for a multicentre randomized controlled trial - Lunkenheimer, F; Domhardt, M; Geirhos, A (Trials, 2020)
. doi:10.1186/s13063-019-4041-9