Plasma Cobalamin Levels Affect Information Processing Speed in a Longitudinal Study of HIV-1 Disease
Arch Neurol 52:195-198, Shor-Posner,G.,et al, 1995
Plasma Vitamin B12 Level as a Potential Cofactor in Studies of HIV Type 1-Related Cognitive Changes
Arch Neurol 49:501-506, Beach,R.S.,et al, 1992