1. Department of Diagnostic Ultrasound; Dongfang Hospital, Fujian Medical University; Fuzhou Fujian 350002 People's Republic of China
2. Department of Medical Engineering; Dongfang Hospital, Union Hospital, Fujian Medical University; Fuzhou Fujian 350002 People's Republic of China
3. Department of Nephrology; Union Hospital, Fujian Medical University; Fuzhou Fujian 350001 People's Republic of China