Exploring the causal link between serum 25-hydroxyvitamin D concentrations and idiopathic sudden sensorineural hearing loss: Insights gained from a Mendelian randomization study involving two independent samples. - Zhao, Ying; Yu, Cong; Sun, Hengchang; Xie, Fangmei; Shen, Jian; Li, Xiaoming; Song, Xiaoyu; Luo, Wenfeng; He, Jinhua; Han, Zeping (PLoS ONE, 2025)