Cognitive-behavioural therapy for clozapine-resistant schizophrenia: the FOCUS RCT - Morrison, AP; Pyle, M; Gumley, A; Schwannauer, M; Turkington, D; MacLennan, G; Norrie, J; Hudson, J; Bowe, S; French, P; Hutton, P; Byrne, R; et al. (HEALTH TECHNOLOGY ASSESSMENT, 2019)