Computed tomography characteristics of acute pancreatitis based on different etiologies at different onset times: a retrospective cross-sectional study - Du, Juanjuan; Zhang, Ju; Zhang, Xinyu; Jiang, Rui; Fu, Quanshui; Yang, Guoqing; Fan, Hui; Tang, Mengyue; Chen, Tianwu; Li, Xinghui; Zhang, Xiaoming (Quantitative Imaging in Medicine and Surgery, 2022)