1. Fundación Universitaria Sanitas; School of Medicine; Bogotá Distrito Capital Colombia
2. Hospital Universitario San Ignacio; Research Office; Bogotá Colombia
3. Fundación Universitaria Sanitas; Clinical Research Institute; Bogotá Colombia
4. Fundación Universitaria Sanitas; Department of Obstetrics and Gynecology; Bogotá Colombia
5. Faculty of Medicine, Universidad Nacional de Colombia; Department of Obstetrics and Gynecology; Carrera 30 No 45-03 Bogota Colombia
6. Faculty of Medicine, Universidad Nacional de Colombia; Clinical Research Institute; Bogota Colombia