1 Department of Public Health, Federal University of Ceara, Professor Costa Mendes, 1608 - Didactic Block, 5th floor Neighboor Rodolfo Teófilo, Fortaleza, Ceará, 60.430-140, Brazil. ilafranca@yahoo.com.br.
2 Department of Public Health, Federal University of Ceara, Professor Costa Mendes, 1608 - Didactic Block, 5th floor Neighboor Rodolfo Teófilo, Fortaleza, Ceará, 60.430-140, Brazil.
3 School of Public Health and Tropical Medicine Tulane University, New Orleans, USA.