Cross-validation of IFN-γ Elispot assay for measuring alloreactive memory/effector T cell responses in renal transplant recipients. by Bestard, O, Crespo, E, Stein, M, Lúcia, M, Roelen, D, de Vaal, Y, Hernandez-Fuentes, M, Chatenoud, L, Wood, K, Claas, F, Cruzado, J, Grinyó, J, Volk, H, Reinke, P