Affiliation: | 1. Department of Epidemiology, School of Public Health, , S?o Paulo, Brazil;2. Department of Social Medicine, Ribeir?o Preto School of Medicine, Universidade de S?o Paulo, , S?o Paulo, Brazil;3. School of Public Health, Universidade de S?o Paulo, , S?o Paulo, Brazil;4. Nursing School, Universidade de S?o Paulo, , S?o Paulo, Brazil |