1 Department of Pediatrics, Taipei Tzu Chi Hospital, New Taipei City, Taiwan; Division of Nephrology, Department of Pediatrics, National Taiwan University Children Hospital, Taiwan.
2 Division of Nephrology, Department of Pediatrics, National Taiwan University Children Hospital, Taiwan.
3 Department of Pathology, National Taiwan University Hospital, Taiwan.
4 Division of Nephrology, Department of Pediatrics, National Taiwan University Children Hospital, Taiwan. Electronic address: ijtsai@ntu.edu.tw.