1. Department of Obstetrics and Gynecology; Massachusetts General Hospital; Harvard Medical School; Boston MA USA
2. Maternity Services; The Royal Women's Hospital; Parkville Vic. Australia
3. Evidence Based Healthcare Post Graduate Program; Sao Paulo Federal University; Sao Paolo Brazil
4. Department of Reproductive Health and Research; World Health Organization; HRP - UNDP/UNFPA/UNICEF/WHO/World Bank Special Programme of Research, Development and Research Training in Human Reproduction; Geneva Switzerland