1. National Center on Birth Defects and Developmental DisabilitiesCenters for Disease Control and Prevention Atlanta Georgia
2. G2S Corporation San Antonio Texas
3. Eagle Medical Services San Antonio Texas
4. Oak Ridge Institute for Science and Education Oak Ridge Tennessee
5. Massachusetts Department of Public HealthCenter for Birth Defects Research and Prevention Boston Massachusetts
6. North Carolina Department of Health and Human ServicesBirth Defects Monitoring Program Raleigh North Carolina