1. Renal Division, Department of Medicine, Peking University First Hospital; Institute of Nephrology, Peking University;
2. Key laboratory of Renal Disease, Ministry of Health of China, Beijing, PR. China;
3. Key Laboratory of CKD Prevention and Treatment, Ministry of Education of China, Beijing, PR. China;
4. Laboratory of Electron Microscopy, Pathological Center, Peking University First Hospital, Beijing, P.R. China;
5. Peking-Tsinghua Center for Life Sciences, Beijing, PR. China