1. Department of Ultrasound, Zhongshan Hospital, Fudan University, Shanghai, China
2. Department of Gastroenterology and Hepatology, University of Medicine and Pharmacy Victor Babes, Timisoara, Romania
3. Ultrasound Unit, Department of Infectious Diseases, Fondazione IRCCS Policlinico San Matteo, University of Pavia, Pavia, Italy
4. Department of Medical Imaging, des Cévennes Clinic, Annonay, France and Caritas Krankenhaus Bad Mergentheim, Bad Mergentheim, Germany
5. Department of Medical Ultrasound, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
6. Sino-German Research Center of Ultrasound in Medicine, The First Affiliated Hospital of Zhengzou University, Zhengzfou, China
7. National Centre for Ultrasound in Gastroenterology, Haukeland University Hospital, Bergen and Department of Clinical Medicine, University of Bergen, Norway
8. Department of Radiology, King's College London, King's College Hospital, Denmark Hill, London
9. Medizinische Klinik 2, Caritas-Krankenhaus Bad Mergentheim, Germany. Sino-German Research Center of Ultrasound in Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China