Apathy as a Risky Neuropsychiatric Syndrome of Progression From Normal Aging to Mild Cognitive Impairment and Dementia: A Systematic Review and Meta-Analysis oleh Zili Fan, Zili Fan, Luchun Wang, Luchun Wang, Haifeng Zhang, Haifeng Zhang, Xiaozhen Lv, Xiaozhen Lv, Lihui Tu, Lihui Tu, Ming Zhang, Ming Zhang, Ying Zhang, Ying Zhang, Caihua Yan, Xin Yu, Xin Yu, Huali Wang, Huali Wang