Efficacy of methylphenidate for the treatment of apathy in patients with Alzheimer's disease: a systematic review and meta-analysis of randomized controlled studies. - Lee, Chia-Wei; Chen, Jui-Yi; Ko, Ching-Chung; Chuang, Min-Hsiang; Tsai, Wen-Wen; Sun, Cheuk-Kwan; Hung, Kuo-Chuan (Psychopharmacology, 2022)