1. Department of Ultrasound, Zhongshan Hospital of Xiamen University, Xiamen, Fujian, China (mainland)
2. Department of Gastrointestinal Surgery, Zhongshan Hospital of Xiamen University, Xiamen, Fujian, China (mainland)
3. Department of General Surgery, Zhongshan Hospital of Xiamen University, Xiamen, Fujian, China (mainland)
4. Department of Neonatology, Zhongshan Hospital of Xiamen University, Xiamen, Fujian, China (mainland)
5. Department of Ultrasound, Children’s Hospital of Fudan University Xiamen Branch, Xiamen Children’s Hospital, Xiamen, Fujian, China (mainland)