1. Department of Obstetrics and Gynecology, University of Campinas School of Medicine, Campinas, Brazil
2. Woman's Hospital Prof. Dr. J. A. Pinotti-CAISM, Campinas, Brazil
3. Medical School of Jundiaí, Jundiaí, Brazil
4. University of Campinas Nursing School, Campinas, Brazil
5. Hospital of Clinics of Porto Alegre (HCPA) – UFRGS. Rua Ramiro Barcelos, Porto Alegre, Brazil
6. Hospital of Clinics of Federal University of Paraná. Rua General Carneiro, Curitiba, Brazil
7. Sumaré State Hospital, Sumaré, Brazil
8. Woman’s Hospital of Recife, Recife, Brazil
9. Maternity School Assis Chateaubriand, Fortaleza, Brazil