The relationship between vitamin D levels and depression: a genetically informed study. - Lyu, Honggang; Kang, Lijun; Gong, Qian; Xie, Xin-Hui; Ma, Simeng; Yao, Lihua; Chen, Mian-mian; Zhang, Lingfeng; Yu, Hao; Wang, Xubo; Wang, Chao; Liu, Zhongchun (Nutrition Journal, 2025)