A major outbreak of asthma associated with a thunderstorm: Experience of accident and emergency departments and patients' characteristics by Davidson, A, Emberlin, J, Cook, A, Venables, K, Wallis, D, Webb, J, Brooke, D, Brookes, B, Brown, R, Findlay, A, Harris, M, Hulbert, D, Little, G, Nonoo, C, O'Donnell, C, Park, G, Soorma, A