Diagnostic criteria for depression in Parkinson's disease: A study of symptom patterns using latent class analysis

Environmental and Familial Risk Factors of Parkinsons Disease: Case-Control Study

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Depression and anxiety related subtypes in Parkinson's disease

(2011) R. G. Brown et al.   JOURNAL OF NEUROLOGY NEUROSURGERY AND PSYCHIATRY

Anxiety disorders in Parkinson's disease: Prevalence and risk factors

(2010) Nadeeka N.W. Dissanayaka et al.   MOVEMENT DISORDERS

The syndromal validity and nosological position of apathy in Parkinson's disease

(2009) Sergio E. Starkstein et al.   MOVEMENT DISORDERS

Occurrence and clinical correlates of REM sleep behaviour disorder in patients with Parkinson's disease over time

(2007) M D Gjerstad et al.   JOURNAL OF NEUROLOGY NEUROSURGERY AND PSYCHIATRY

A validation study of depressive syndromes in Parkinson's disease

(2007) Sergio E. Starkstein et al.   MOVEMENT DISORDERS