Diseases of the Nervous System Caused by Nutritional Deficiency, Vitamin B12 (Cobalamin) Deficiency (Subacute Combined Degeneration)
Adams & Victors Principles of Neurology Chp 41, pg 1172, Ropper, A.H.,et al, 2014
A Man Who Lost Weight and His Sight
Lancet 351:1174-1175, Moschos,M.&Droutsas,D., 1998