1. Medical School of Chinese PLA, Beijing, China.
2. Department of Ultrasound, The First Medical Centre, Chinese PLA General Hospital, Beijing, China.
3. Department of Nephrology, The First Medical Centre, Chinese PLA General Hospital, Nephrology Institute of the Chinese PLA, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, Beijing Key Laboratory of Kidney Disease Research, Beijing, China.
4. Department of Rehabilitation Medicine, The Second Medical Centre, Chinese PLA General Hospital, Beijing, China.
5. No.962 Hospital of the PLA Joint Logistic Support Force, Harbin, China.
6. Medical College of Nankai University, Tianjin, China.
7. Department of Ultrasound, The Sixth Medical Centre, Chinese PLA General Hospital, Beijing, China.
8. Department of Ultrasound, The Fourth Medical Centre, Chinese PLA General Hospital, Beijing, China.