1. SEMEAR Fertilidade, Reproductive Medicine; Ribeirão Preto Brazil
2. Department of Obstetrics and Gynecology, Ribeirão Preto Medical School; University of Sao Paulo; Ribeirão Preto Brazil
3. GENERA Centre for Reproductive Medicine, Clinica Valle Giulia; Rome Italy
4. HRP (the UNDP/UNFPA/UNICEF/WHO/World Bank Special Programme of Research; Development and Research Training in Human Reproduction); Geneva Switzerland
5. Population Council; Reproductive Health Program; New York NY USA
6. Division of Reproductive Endocrinology; University of Pennsylvania; Philadelphia PA USA
7. Department of Obstetrics, Gynecology and Reproductive Biology; Brigham and Women's Hospital, Harvard Medical School; Boston MA USA