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This document is a list of references cited in a study on neuropsychiatric symptoms and caregiver burden in Parkinson's disease. The references include studies on the cognitive correlates of psychosis, hallucinations, and delusions in Parkinson's disease, as well as the relevance of cognitive decline and depression in the early stages of the disease. The document also includes references to meta-analyses on cognitive and visual processing performance in Parkinson's disease patients with and without visual hallucinations. Other references discuss the assessment of cognitive function, the prevalence and risk factors of hallucinations in Parkinson's disease, and the impact of cognitive impairment on the development of Parkinson's disease dementia. The document also includes references to studies on the effectiveness of cognitive rehabilitation and exercise training in Parkinson's disease, as well as the treatment options for nonmotor symptoms and psychiatric complications in the disease. [Extracted from the article]