1. Interdisciplinary Center for Health Studies (CIESAL Universidad de ValparaísoCochrane Chile Associate Center Valparaíso Chile
2. Department of Gynecology and Obstetrics Division of Maternal and Fetal Medicine Faculty of Medicine Universidad de ValparaísoHospital Dr. Gustavo Fricke Viña del Mar Chile
3. UC Evidence Center Cochrane Chile Associate Center Pontificia Universidad Católica de Chile Santiago Chile
4. Universidad de Jaen Jaen Spain