The clinical and cost effectiveness of a Breathlessness Intervention Service for patients with advanced non-malignant disease and their informal carers: mixed findings of a mixed method randomised controlled trial - Farquhar, MC; Prevost, AT; McCrone, P; Brafman-Price, B; Bentley, A; Higginson, IJ; Todd, CJ; Booth, S (Trials, 2016)