Associations of the Charlson comorbidity index with asthma and mortality (NHANES 2007–2018): a cross-sectional study. - Zhang, Jia; Chen, Huan; Liu, Jin; Chen, Yuqian; Qiu, Yuanjie; Hu, Huizhong; Meng, Yihan; Zhang, Qianqian; Li, Manxiang (Journal of Health, Population & Nutrition, 2025)