1. Department of Ultrasound Medicine, The Affiliated Zhoupu Hospital, Shanghai University of Medicine and Health Sciences, Shanghai, China (mainland)
2. Shanghai Leren Dongsheng Clinic, Shanghai, China (mainland)
3. Department of Ultrasound Medicine, Tongji Hospital, Tongji University, School of Medicine, Shanghai, China (mainland)
4. Department of General Surgery, Tongji Hospital, Tongji University, School of Medicine, Shanghai, China (mainland)