1. Graduate Programme in Nursing Federal University of Sergipe São Cristóvão Brazil
2. Centre for Epidemiology and Public Health Federal University of Alagoas Arapiraca Brazil
3. Department of Nursing Federal University of Alagoas Arapiraca Brazil
4. Department of Nursing Federal University of Sergipe Aracaju Brazil
5. Department of Biology Federal University of Sergipe São Cristóvão Brazil