Adjunctive dexamethasone in bacterial meningitis: a meta-analysis of individual patient data. by van de Beek, D, Farrar, J, de Gans, J, Mai, N, Molyneux, E, Peltola, H, Peto, T, Roine, I, Scarborough, M, Schultsz, C, Thwaites, G, Tuan, P, Zwinderman, A