A study on Mahjong intervention to improve cognitive impairment in patients with schizophrenia: a pilot, single-blind, randomized, controlled trial. - Hu, Renqin; Xie, Zongli; Li, Junyao; Luo, Huirong; Guo, Yanwei; Tan, Jinglan; Luo, Qinghua (BMC Psychiatry, 2025)