Validation and internal consistency of Patient Health Questionnaire-9 for major depression in Parkinson's disease

Chagas, Marcos Hortes N ; Tumas, Vitor ; Rodrigues, Guilherme R ; Machado-de-Sousa, João Paulo ; Filho, Alaor Santos ; Hallak, Jaime E C ; Crippa, José Alexandre S

Age and ageing, 2013-09, Vol.42 (5), p.645-649 [Periódico revisado por pares]

England: Oxford Publishing Limited (England)

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