- Heterozygous P0 knockout mice develop a peripheral neuropathy that resembles chronic inflammatory demyelinating polyneuropathy (CIDP). Shy, M.E., Arroyo, E., Sladky, J., Menichella, D., Jiang, H., Xu, W., Kamholz, J., Scherer, S.S. J. Neuropathol. Exp. Neurol. (1997)