Degenerative Diseases of the Nervous System, Parkinson DiseaseAdams & Victors Principles of Neurology, Chp 39, pg 1082, Ropper, A.H.,et al, 2014
Antemortem Diagnosis of Diffuse Lewy Body DiseaseNeurol 40:1523-1528, Crystal,H.A.,et al, 1990