Diseases of the Nervous System Caused by Nutritional Deficiency, Pellagra (Niacin, Nicotinic Acid, B3 Deficiency)
Adams & Victors Principles of Neurology Chp 41, pg 1170, Ropper, A.H.,et al, 2014
Neurologic Aspects of Inflammatory Bowel Disease
Neurol 45:416-421, Lossos,A.,et al, 1995