1. Department of Pediatrics, Faculdade Pernambucana de Saúde (FPS), Recife, Brazil.
2. Department of Radiology, Instituto de Medicina Integral Prof. Fernando Figueira (IMIP), Recife, Brazil.
3. Department of Neonatology, Instituto de Medicina Integral Prof. Fernando Figueira (IMIP), Recife, Brazil.
4. Department of Biostatistics, Instituto de Medicina Integral Prof. Fernando Figueira (IMIP), Recife, Brazil.
5. Department of Pediatrics, Instituto de Medicina Integral Prof. Fernando Figueira (IMIP), Recife, Brazil.