Building and validating machine learning models to predict appendiceal perforation during conservative treatment of fecalith-associated appendicitis: a 20-algorithm multicenter retrospective analysis. - Zhu, Youlong; Feng, Jiawei; Liu, Ruming; Ren, Wang; Ma, Xiao; Wang, Ning; Gong, Longbo; Kong, Feifei (Scientific Reports, 2026)