Nocturnal temperature-controlled laminar airflow device for adults with severe allergic asthma: the LASER RCT door Kapoor, M, Storrar, W, Balls, L, Brown, T, Mansur, A, Hedley, E, Jones, T, Roberts, C, Shirkey, B, Dutton, S, Luengo-Fernandez, R, Little, M, Dewey, A, Marshall, S, Fogg, C, Boughton, K, Rahman, N, Yu, L, Bradding, P, Howarth, P, Chauhan, A