Genetically resistant mice lacking interleukin-12 are susceptible to infection with Leishmania major and mount a polarized Th2 cell response - Mattner, F; Magram, J; Ferrante, J; Launois, P; Di Padova, K; Behin, R; Gately, M K; Louis, J A; Alber, G (Eur J Immunol, 1996)