Brooks B R, Swarz J R, Narayan O, Johnson R T
Infect Immun. 1979 Feb;23(2):540-4. doi: 10.1128/iai.23.2.540-544.1979.
A 10-fold reduction in the incubation period of murine neurotropic retrovirus spongiform polioencephalomyelopathy was effected by a 1,000-fold concentration of the cloned virus inoculum.