The heterogeneity of cognitive symptoms in Parkinson's disease: a meta-analysis

Brief Cognitive Assessment in the Early Stages of Parkinson Disease

(2011) Paulo Bugalho et al.   Cognitive and Behavioral Neurology

Neuroimaging studies of different cognitive profiles in Parkinson's disease

(2011) Oury Monchi et al.   PARKINSONISM & RELATED DISORDERS

Neuropsychological and clinical heterogeneity of cognitive impairment and dementia in patients with Parkinson's disease

(2010) Angie A Kehagia et al.   LANCET NEUROLOGY

Mild cognitive impairment in Parkinson disease: A multicenter pooled analysis

(2010) D. Aarsland et al.   NEUROLOGY

Understanding the dopaminergic deficits in Parkinson’s disease: Insights into disease heterogeneity

(2009) Simon J.G. Lewis et al.   JOURNAL OF CLINICAL NEUROSCIENCE

Preferred Reporting Items for Systematic Reviews and Meta-Analyses: The PRISMA Statement

(2009) David Moher et al.   PLOS MEDICINE

Parkinson's disease-cognitive rating scale: A new cognitive scale specific for Parkinson's disease

(2008) Javier Pagonabarraga et al.   MOVEMENT DISORDERS

The association between motor subtypes and psychopathology in Parkinson's disease

(2008) J.S.A.M. Reijnders et al.   PARKINSONISM & RELATED DISORDERS