Reséndiz, M., Montalvo Corral, M., Flores Mendoza, L., Ramírez Mendoza, H., Segalés, J. and Hernández, J. 2013. Cytokine expression in growing pigs co-infected with porcine circovirus type 2 and porcine reproductive and respiratory syndrome virus. Veterinaria México OA. 43, 1 (Aug. 2013).