Short- and medium-term exposure to ambient air pollutants and severity of obstructive sleep apnea: A population-based study in Nanjing - Xia Tang; Haili Ren; Yuting Huang; Ting Xu; Daling Hu; Yizhang Xia; Tongda Xu; Quan Wang; Jiemiao Shen; Minghui Ji (Environmental Research, 2026)