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Parkinsonism is a clinical motor syndrome characterised by tremor, rigidity, bradykinesia and postural instability and gait disturbance. Among the many causes, neurodegenerative diseases, such as Parkinson's disease (PD) and drug induced or vascular Parkinsonism (VP), are the most common.1 With the increasing number of elderly people, the prevalence of Parkinsonism is increasing. Accurate diagnosis of Parkinsonism is important for optimal management. Whereas much is known about the underlying mechanisms of PD, the mechanism and diagnostic markers of VP remain largely unknown. For example, it is unclear why the lower limbs are more commonly affected in VP when compared …
Competing interests DA has received research support from GE Health.
Provenance and peer review Not commissioned; externally peer reviewed.