A CT-based nomogram established for differentiating gastrointestinal heterotopic pancreas from gastrointestinal stromal tumor: compared with a machine-learning model. - Na Feng; Hai-Yan Chen; Xiao-Jie Wang; Yuan-Fei Lu; Jia-Ping Zhou; Qiao-Mei Zhou; Xin-Bin Wang; Jie-Ni Yu; Risheng Yu; Jian-Xia Xu (BMC Medical Imaging, 2023)