1. Department of Medical Ultrasound, Affiliated Hospital of Nantong University, Nantong, Jiangsu, China (mainland)
2. Department of Medical Ultrasound, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China (mainland)
3. Department of Ultrasound, Affiliated Renhe Hospital of China Three Gorges University, Yichang, Hubei, China (mainland)
4. Department of Medical Ultrasound, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China (mainland)
5. Department of Ultrasound, Hubei Cancer Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China (mainland)
6. Department of Internal Medicine, Hirslanden Clinic, Bern, Switzerland