1. Institute of Life Science, Chongqing Medical University, Chongqing 400016, China
2. Laboratory of Biomedical Ultrasonics, Institute of Women and Children’s Health/Key Laboratory of Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu 610041, China
3. Department of General Surgery, The First Affiliated Hospital, Chongqing Medical University, Chongqing 400016, China