1 Department of Radiology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China.
2 Department of General Surgery, Beijing Friendship Hospital, Capital Medical University & National Clinical Research Center for Digestive Diseases, Beijing 100050, China.
3 School of Biological Science and Medical Engineering, Beihang University, Beijing 100191, China.
4 Department of Radiology, Beijing Tiantan Hospital, Capital Medical University, Beijing 100070, China.
5 Department of General Surgery, Beijing Tiantan Hospital, Capital Medical University, Beijing 100070, China.
6 Department of MR, Beijing Shijitan Hospital, Capital Medical University/Peking University, Ninth Clinical Medical College, Beijing 100038, China.
7 Department of General Surgery, Beijing Shijitan Hospital, Capital Medical University/Peking University, Ninth Clinical Medical College, Beijing 100038, China.
8 Department of Radiology, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing 100730, China.
9 Department of General Surgery, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing 100730, China.
10 Department of Radiology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China.
11 Department of Bariatric and Metabolic Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China.
12 Department of Radiology, Huashan Hospital, Fudan University, Shanghai 200040, China.
13 Center for Obesity and Metabolic Surgery, Huashan Hospital, Fudan University, Shanghai 200040, China.
14 Department of Radiology, Zhongshan Hospital, Fudan University, Shanghai 200032, China.
15 Department of Radiology, The Second Affiliated Hospital of Shandong First Medical University, Tai'an, Shandong 271000, China.