1. Department of Internal Medicine of Ribeirao Preto Medical School, University of São Paulo , 14049-900 Ribeirao Preto, São Paulo , Brazil
2. Faculty of Medicine, Federal University of Mato Grosso do Sul, 79070-900 , Campo Grande, Mato Grosso do Sul , Brazil
3. Department of Pediatrics of Ribeirao Preto Medical School, University of São Paulo , 14049-900 Ribeirao Preto, São Paulo , Brazil