1 Renal Division, Peking University First Hospital, Renal Pathological Center, Institute of Nephrology, Peking University, Beijing 100034, China Laboratory of Electron Microscopy, Peking University First Hospital, Beijing 100034, China.
2 Renal Division, Peking University First Hospital, Renal Pathological Center, Institute of Nephrology, Peking University, Beijing 100034, China.