1. Obstetrics Career, Universidad Central del Ecuador, Quito 170403, Ecuador
2. Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto 14040-900, Brazil
3. Neonatology Department, Hospital Gineco-Obstétrico Isidro Ayora, Quito 170136, Ecuador
4. Puengasí 2 Health Center, District 17D04 Puengasí in Itchimbia, Quito 170145, Ecuador
5. Department of Social Medicine, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto 14040-900, Brazil
6. Department of Gynecology and Obstetrics, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto 14049-900, Brazil