Nitrate contamination characteristics and health risk assessment of groundwater in the typical area of the lower Yellow River Basin. - Deng, Qinghai; Wu, Xiao; Zhang, Wenqiang; Teng, Yue; Li, Changsuo; Gu, Tianshuo; Hu, Caiping; Xu, Qingyu; Liu, Xiaotian; Gao, Shuai (PLoS ONE, 2026)