Primary Tumor Radiomic Model for Identifying Extrahepatic Metastasis of Hepatocellular Carcinoma Based on Contrast Enhanced Computed Tomography oleh Lawrence Wing Chi Chan, Sze Chuen Cesar Wong, William Chi Shing Cho, Mohan Huang, Fei Zhang, Man Lik Chui, Una Ngo Yin Lai, Tiffany Yuen Kwan Chan, Zoe Hoi Ching Cheung, Jerry Chun Yin Cheung, Kin Fu Tang, Man Long Tse, Hung Kit Wong, Hugo Man Fung Kwok, Xinping Shen, Sailong Zhang, Keith Wan Hang Chiu