Blurred Vision and Epistaxis
BMJ 348:g91, Shirley, K. & McNicholl, F.P., 2014
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
Folate, Vitamin B12, and Risk of Ischemic and Hemorrhagic Stroke
Stroke 36:1426-1431, Guelpen,B.V.,et al, 2005