1. Departamento de Ginecología y Obstetricia, Facultad de Medicina; Clínica Alemana - Universidad del Desarrollo; Santiago Chile
2. Departamento de Ginecología y Obstetricia; Hospital Clínico de la Universidad de Chile; Santiago Chile
3. Department of Obstetrics and Gynecology, Sydney Medical School Nepean; University of Sydney; Penrith Australia
4. Universiti Kebangsaan Malaysia Medical Centre; Kuala Lumpur Malaysia
5. Department of Obstetrics and Gynecology; Liverpool Hospital, University of Western Sydney; Sydney NSW Australia