Retinitis Pigmentosa
Surv Ophthalmol 33:137-177, Pagon,R.A., 1988
Nystagmus of Pelizaeus-Merzbacher Disease
Arch Neurol 48:87-91, Trobe,J.D.,et al, 1991
A Controlled Study of Early Neurologic Abnor in Men with Asympt HIV Infection
NEJM 323:864-870, Koralnik,I.J.,et al, 1990