Gram-negative bacteraemia; a multi-centre prospective evaluation of empiric antibiotic therapy and outcome in English acute hospitals. by Fizpatrick, J, Biswas, J, Edgeworth, J, Islam, J, Jenkins, N, Judge, R, Lavery, A, Melzer, M, Morris-Jones, S, Nsutebu, E, Peters, J, Pillay, D, Pink, F, Price, J, Scarborough, M, Thwaites, G, Tilley, R, Walker, A, Llewelyn, M, United Kingdom Clinical Infection Research Group