- Immunohistochemical evaluation of canine primary liver carcinomas: distribution of alpha-fetoprotein, carcinoembryonic antigen, keratins and vimentin. Martín de las Mulas, J., Gómez-Villamandos, J.C., Pérez, J., Mozos, E., Estrado, M., Méndez, A. Res. Vet. Sci. (1995)