1. Department of Pediatrics, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Brazil
2. Federal University of Uberlandia, Brazil
3. Boldrini Children's Center, Campinas, Brazil
4. Department of Surgery, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Brazil
5. Department of Pathology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Brazil
6. Department of Internal Medicine, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Brazil