The Nonmotor Problems of Parkinson's Disease
The Neurologist 6:18-27, Friedman,J.H.&Fernandez,H.H., 2000
The"Gulf War Syndrome"-Is There Evidence of Dysfunction in the Nervous System
JNNP 60:449-451, Jamal,G.A.,et al, 1996
Tourette Syndrome and Other Tic Disorders, Diagnosis, Pathophysiology, and Treatment
Medicine 70:15-32, Singer,H.S.&Walkup,J.T., 1991