An algorithm (decision tree) for the management of Parkinson’s disease (2001):

Parkinson’s disease (PD) is named in honor of James Parkinson, whose classic monograph, “An Essay on the Shaking Palsy,” written in 1817, has provided an enduring description of the clinical features of this disorder.1 PD is an age-related neurodegenerative disorder with an average age at onset of 60 years. An estimated 1 million persons in the United States suffer from PD,2 and there are approximately 60,000 new cases each year. United States...