1. Department of Gynecology and Obstetrics, Botucatu Medical School, Universidade Estadual Paulista “Júlio de Mesquita Filho”, Botucatu, SP, Brazil
2. Department of Gynecology and Obstetrics, Faculty of Medicine, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
3. Department of Gynecology and Obstetrics, Faculty of Medicine, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
4. Department of Tocoginecology, Centro Universitário Lusíada, Santos, SP, Brazil
5. Department of Obstetrics and Gynecology, Faculty of Medicine, Pontifícia Universidade Católica de São Paulo, São Paulo, SP, Brazil
6. Department of Maternal and Child Health, Faculty of Medicine, Universidade Federal do Amazonas, Manaus, AM, Brazil
7. Department of Gynecology and Obstetrics, Faculty of Medical Sciences, Universidade Estadual de Campinas, Campinas, SP, Brazil
8. Department of Gynecology and Obstetrics, Faculty of Medicine, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
9. Paulista School of Medicine, Universidade Federal de São Paulo, São Paulo, SP, Brazil
10. Department of Obstetrics and Gynecology, Faculty of Medicine, Universidade Federal de Uberlândia, Uberlândia, MG, Brazil
11. Gynecology and Obstetrics Training Center, School of Medicine, Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre, RS, Brazil