1. Department of Clinical and Toxicological Analyses; Federal University of Rio Grande do Norte; Natal Brazil
2. Radiology Center; Onofre Lopes University Hospital of Federal University of Rio Grande do Norte; Natal RN Brazil
3. Department of Pediatrics; Federal University of Rio Grande do Norte; Natal RN Brazil
4. Department of Clinical and Toxicological Analyses; University of São Paulo; São Paulo SP Brazil