1. Post-Graduate Program in Biological Sciences, Federal University of Rio Grande do Norte, Avenida Salgado Filho, S/N, Campus Universitario, Lagoa Nova, 59072-970 Natal, RN, Brazil
2. Post-Graduate Program in Health Sciences, Federal University of Rio Grande do Norte, Avenida General Gustavo de Farias, S/N, Petropolis, 59012-570 Natal, RN, Brazil
3. Department of Tocogynecology, Federal University of Rio Grande do Norte, Avenida Nilo Peçanha 259, Petropolis, 59012-300 Natal, RN, Brazil
4. Department of Biomedical Sciences, University of Rio Grande do Norte State, Rua Miguel Antonio da Silva Neto, S/N, Aeroporto, 59607-360 Mossoro, RN, Brazil
5. Department of Statistics, Federal University of Rio Grande do Norte, Avenida Salgado Filho, S/N, Campus Universitario, Lagoa Nova, 59078-970 Natal, RN, Brazil
6. Pediatric Hospital, Federal University of Rio Grande do Norte, Avenida General Gustavo de Farias, S/N, Petropolis, 59012-570 Natal, RN, Brazil
7. Department of Microbiology and Parasitology, Federal University of Rio Grande do Norte, Avenida Salgado Filho, S/N, Campus Universitario, Lagoa Nova, 59072-970 Natal, RN, Brazil