Key references: Overview of Parkinson disease

  • Hughes AJ, Daniel SE, Kilford L, Lees AJ. Accuracy of clinical diagnosis of idiopathic Parkinson's disease: a clinico-pathological study of 100 cases. J Neurol Neurosurg Psychiatry 1992;55(3):181–4. https://www.ncbi.nlm.nih.gov/pubmed/1564476