1. Department of Public Health Nursing, College of Nursing, State University of Rio de Janeiro, Rio de Janeiro, Brazil.
2. Evandro Chagas National Institute of Infectious Diseases, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil.
3. Department of Quantitative Methods, Federal University of Rio de Janeiro State, Rio de Janeiro, Brazil.
4. College of Nursing, Federal University of Rio de Janeiro State, Rio de Janeiro, Brazil.
5. Medical School, Federal University of Rio de Janeiro State, Rio de Janeiro, Brazil.
6. College of Nursing, Federal University of the State of Rio de Janeiro, Rio de Janeiro, Brazil.
7. Center for Public Health Research, San Francisco Department of Public Health, San Francisco, California, USA.
8. Department of Epidemiology and Biostatistics, University of California, San Francisco, California, USA.