1. Faculdade de Medicina do ABC, Santo Andre, Brazil
2. Hospital Municipal Universitário, São Bernardo do Campo, Brazil
3. Departamento de Saúde Materno-infantil, Faculdade de Saúde Pública, Universidade de São Paulo (USP), Sao Paulo, Brazil
4. Hubert Department of Global Health and Department of Behavioral Sciences and Health Education at the Rollins School of Public Health, Emory University, Atlanta, GA, USA