Enhanced immunogenicity of CTL antigens through mutation of the CD8 binding MHC class I invariant region. by Wooldridge, L, Lissina, A, Vernazza, J, Gostick, E, Laugel, B, Hutchinson, S, Mirza, F, Dunbar, P, Boulter, J, Glick, M, Cerundolo, V, van den Berg, H, Price, D, Sewell, A