1. Department of Research, Latin American Center for Perinatology (CLP-PAHO), Montevideo, Uruguay
2. Department of Obstetrics and Gynecology, University of Campinas, Campinas, Brazil
3. Department of Statistics, Jundiaí School of Medicine - HU/FMJ, Jundiaí, Brazil
4. Department of Obstetrics, Hospital Berta Calderon Roque, Managua, Nicaragua
5. Department of Obstetrics, Hospital España, Chinandega, Nicaragua
6. Department of Obstetrics, Hospital San Lorenzo de Los Mina, Santo Domingo, Dominican Republic
7. Department of Obstetrics, Hospital Regional de Ocidente, Quetzaltenango, Guatemala
8. Hospital San Felipe, Tegucigalpa, Honduras
9. Department of Obstetrics, Hospital Roberto Suazo Cordova, La Paz, Honduras
10. Department of Obstetrics, Hospital Leonardo Martinez Valenzuela, San Pedro Sula, Honduras
11. Department of Obstetrics, Hospital Boliviano Japones, La Paz, Bolivia