Demographic and socioeconomic patterns in healthcare-seeking behaviour for respiratory symptoms in England: a comparison with non-respiratory symptoms and between three healthcare... by Morrison, KE, Colón-González, FJ, Morbey, RA, Hunter, PR, Rutter, J, Stuttard, G, de Lusignan, S, Yeates, A, Pebody, R, Smith, G, Elliot, AJ, Lake, IR