Viral Infections of the Nervous System, Chronic Meningitis, and Prior Diseases, Rabies
Adams & Victors Principles of Neurology, Chp 33, pg 753, Ropper, A.H.,et al, 2014
Neuropsychiatric Disorders Caused by Cobalamin Deficiency in the Absence of Anemia or Macrocytosis
NEJM 318:1720-1728, 1752-17541988., Lindenbaum,J.,et al, 1988