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Zhou, L., Ma, X., & Wang, W. (2021). Relationship between Cognitive Performance and Depressive Symptoms in Chinese Older Adults: The China Health and Retirement Longitudinal Study (CHARLS). Journal of Affective Disorders, 281, 454–458. doi:10.1016/j.jad.2020.12.059 
10.1016/j.jad.2020.12.059
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