Metformin-improved cognitive impairment in patients with schizophrenia is correlated with activation of tricarboxylic acid cycle and restored functional connectivity of hippocampus. - Cai, Jingda; Xiao, Jingmei; Long, Yujun; Cao, Ting; Lin, Chenquan; Hei, Gangrui; Wang, Weiyan; Kang, Dongyu; Huang, Jing; Shao, Tiannan; Cai, Hualin; Wu, Renrong (BMC Medicine, 2025)