Degenerative Diseases of the Nervous System, Parkinson Disease
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Twinning and Neurologic Morbisity
Am J Dis Child 146:1110-1113, Scheller,J.M.&Nelson,K.B., 1992
The First Report of Cluster Headache in Identical Twins
Neurol 41:761, Couturier,E.G.M.,et al, 1991