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Reliability and validity of the Apathy Evaluation Scale.
Marin RS, Biedrzycki RC, Firinciogullari S. Marin RS, et al. Among authors: biedrzycki rc. Psychiatry Res. 1991 Aug;38(2):143-62. doi: 10.1016/0165-1781(91)90040-v. Psychiatry Res. 1991. PMID: 1754629