1. Department of Pediatrics, Unit of Pediatric Nephrology, Faculty of Medicine, Federal University of Minas Gerais (UFMG), Belo Horizonte, MG, Brazil
2. Interdisciplinary Laboratory of Medical Investigation, Faculty of Medicine, UFMG, Belo Horizonte, MG, Brazil
3. Institute of Nephropatology & Center of Electronic Microscopy, UFMG, Belo Horizonte, MG, Brazil