Viral Infections of the Nervous System, Chronic Meningitis, and Prior Diseases, Encephalitis Lethargica (non Economo Disease, sleeping sickness)
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Post-encephalitic Parkinsonism:Current Experience
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Oculomotor Abnormalities in Parkinson's Disease
Arch Neurol 36:360-364, Shibasaki,H.,et al, 1979