Automated virtual reality (VR) cognitive therapy for patients with psychosis: study protocol for a single-blind parallel group randomised controlled trial (gameChange) by Freeman, D, Yu, L-M, Kabir, T, Martin, J, Craven, M, Leal, J, Lambe, S, Brown, S, Morrison, A, Chapman, K, Dudley, R, O'Regan, E, Rovira, A, Goodsell, A, Rosebrock, L, Bergin, A, Cryer, TL, Robotham, D, Andleeb, H, Geddes, JR, Hollis, C, Clark, DM, Waite, F