Comprehensive evaluation of the nutritional value and contaminants of alfalfa (Medicago sativa L.) in China - Zhu, Xiaoyan; Chen, Wenxue; Li, Mengyao; Liu, Boshuai; Zhao, Shumin; Hu, Menglin; Li, Jiajing; Li, Defeng; Shi, Yinghua; Sun, Hao; Wang, Chengzhang (Frontiers in Nutrition, 2025)