The Nonmotor Problems of Parkinson's Disease
The Neurologist 6:18-27, Friedman,J.H.&Fernandez,H.H., 2000
The Parkinsons Complex: Parkinsonism Is Just the Tip of the Iceberg
Ann Neurol 59:591-596, Langston,J.W., 2006
Case Records of the MassGeneral Hospital, Case 41-1975, Acute Intermittent Porphyria
NEJM 293:817, Woods,B., 1975
Anticholinergics
NEJM 288:1215, Greenblatt,D.J.,et al, 1973