The Parkinsons Complex: Parkinsonism Is Just the Tip of the Iceberg
Ann Neurol 59:591-596, Langston,J.W., 2006
Autonomic Failure as the Initial Presentation of Parkinson Disease and Dementia with Lewy Bodies
Neurol 63:1093-1095, Kaufmann,H.,et al, 2004
A 67-Year-Old Woman with Abdominal Pain, Constipation, and Urinary Retention
Neurol 99:117-122, Hanna, S.S.,et al, 2022
The Nonmotor Problems of Parkinson's Disease
The Neurologist 6:18-27, Friedman,J.H.&Fernandez,H.H., 2000