Degenerative Diseases of the Nervous System, Parkinson Disease
Adams & Victors Principles of Neurology, Chp 39, pg 1082, Ropper, A.H.,et al, 2014
The British Isles Survey of Multiple Sclerosis in Twins
Neurol 44:11-15, Mumford,C.J.,et al, 1994
Identical Twins with Similar Onset of Parkinson's Disease:A Case Report
Neurol 43:1159-1161, Pahwa,R.,et al, 1993