Optimal activation of tumor-reactive T cells by selected antigenic peptide analogues. by Valmori, D, Fonteneau, J, Valitutti, S, Gervois, N, Dunbar, R, Liénard, D, Rimoldi, D, Cerundolo, V, Jotereau, F, Cerottini, J, Speiser, D, Romero, P