Inhalation Carcinogenesis of High-Fired ${}^{238}{\rm PuO}{}_{2}$ in Rats

Wistar rats were given a single, nose-only exposure to freshly prepared high-fired ${}^{238}{\rm PuO}{}_{2}$ particles (activity median aerodynamic diameter of ${}^{238}{\rm PuO}{}_{2}$, 1.8 ± 0.6 ...