1. New York State Department of Health Albany New York USA
2. Department of Epidemiology University of Iowa, College of Public Health Iowa City Iowa USA
3. Centers for Disease Control and Prevention National Center on Birth Defects and Developmental Disabilities Atlanta Georgia USA
4. Stead Family Department of Pediatrics University of Iowa Carver College of Medicine Iowa City Iowa USA
5. University of Mississippi Medical Center Jackson Mississippi USA
6. Department of Neurology University of Rochester Rochester New York USA