1. Department of Epidemiology; Harvard T. H. Chan School of Public Health; Boston MA
2. Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Brigham and Women's Hospital; Boston MA
3. Divisions of Epilepsy and Women's Health, Department of Neurology, Brigham and Women's Hospital; Boston MA
4. College of Physicians and Surgeons and Mailman School of Public Health; Columbia University; New York NY
5. Oregon Health and Science University; Portland OR
6. North American Antiepileptic Drug Pregnancy Registry, MassGeneral Hospital for Children; Boston MA.