1. Division of Neonatal Medicine, Department of Pediatrics at Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
2. Image Processing Laboratory, Department of Electrical Engineering, Centro Universitario FEI, Sao Bernardo do Campo, São Paulo, Brazil
3. Epidemiology and Biostatistics, Department of Preventive Medicine at Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil