The predictive value of family income to poverty ratio and diabetic retinopathy in adults aged 20 years and above in the United States: a cross-sectional study based on NHANES 1999–2020. - Song, Yanzheng; Qu, Yaohui; Liu, Lin; Li, Zhaoyang; Xiao, Ruopu; Zhang, Xinyu; Wang, Xin; Zhang, Donghan; Guo, Liangqing; Zhang, Hongxing; Han, Xiaochun (BMC Public Health, 2025)