An interpreting machine learning models to predict amputation risk in patients with diabetic foot ulcers: a multi-center study - Tao, Haoran; You, Lili; Huang, Yuhan; Chen, Yunxiang; Yan, Li; Liu, Dan; Xiao, Shan; Yuan, Bichai; Ren, Meng (Frontiers in Endocrinology, 2025)