1. Kidney Disease Center, The First Affiliated Hospital, Zhejiang University School of Medicine, Key Laboratory of Kidney Disease Prevention and Control Technology, National Key Clinical Department of Kidney Diseases. Institute of Nephrology, Zhejiang Clinical Research Center of Kidney and Urinary System Disease, Zhejiang University, Hangzhou 310003, Zhejiang Province, P. R. China
2. Department of Radiology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310003, Zhejiang Province, P. R. China