Diseases of the Nervous System Caused by Nutritional Deficiency, Nutritional Polyneuropathy (Neuropathic Beriberi)
Adams & Victors Principles of Neurology Chp 41, pg 1167, Ropper, A.H.,et al, 2014
Nonmotor Fluctuations in Patients with Parkinson's Disease
Neurol 47:1180-1183, Hillen,M.E.&Sage,J.I., 1996