Combining two serological assays optimises sensitivity and specificity for the identification of Streptococcus equi subsp. equi exposure - Robinson, C; Steward, K F; Potts, N; Barker, C; Hammond, T; Pierce, K; Gunnarsson, E; Svansson, V; Slater, J; Newton, J R; Waller, A S (Vet J, 2013)