1. University of Sao Paulo; Departamento de Epidemiologia-Estatistica; Faculdade de Saude Publica Av Dr Arnaldo 715, Cerqueira Cesar Sao Paulo Brazil CEP 01246 904
2. School of Public Health, University of São Paulo; Department of Nutrition; Av. Doutor Arnaldo 715 - Cerquiera César São Paulo São Paulo Brazil 01.246-904
3. School of Medicine of Botucatu, São Paulo State University (UNESP); Department of Gynaecology and Obstetrics; Rubião Jr. s/n - Rubião Júnior Botucatu São Paulo Brazil 18.618-000
4. University of Vale do Itajaí; Department of Nutrition; Rua Uruguai 458 Itajaí Santa Catarina Brazil 88302-202
5. School of Public Health, University of São Paulo; Department of Maternal-Child Health; Av. Doutor Arnaldo 715 - Cerquiera César São Paulo São Paulo Brazil 01.246-904
6. Faculdade de Saude Publica; Departamento de Epidemiologia; Av Dr Arnaldo 715 Sao Paulo Brazil 01246-904