1. Department of Ultrasound and Chongqing Key Laboratory of Ultrasound Molecular Imaging, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, P. R. China
2. Department of Ultrasound, Chongqing General Hospital, Chongqing 401147, P. R. China
3. Department of Ultrasound, Bishan Hospital of Chongqing, Bishan Hospital of Chongqing Medical University, Chongqing 402760, P. R. China
4. Department of Intensive Care Unit, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, P. R. China
5. Health Management Center & Physical Examination Center, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, P. R. China