1. Department of Obstetrics and Gynecology, Royal College of Surgeons in Ireland, Rotunda Hospital, Dublin, Ireland
2. Department of Molecular and Cellular Therapeutics, Royal College of Surgeons in Ireland, Dublin, Ireland
3. Center for Women's Health Research, University of North Caroline, Chapel Hill, North Carolina
4. Department of Epidemiology and Public Health, Royal College of Surgeons in Ireland, Dublin, Ireland
5. Department of Obstetrics and Gynecology, St. Michael's Hospital, Toronto, Canada