Influence of age and purpose for testing on the cut-off selection of serological methods in bovine neosporosis Gema Álvarez-García, Esther Collantes-Fernández, Eduardo Costas, Xabier Rebordosa and Luis Miguel Ortega-Mora Vet. Res., 34 3 (2003) 341-352 DOI: 10.1051/vetres:2003009