1. ASRT, Inc., Contracting agency to the Division of Viral Diseases, National Center for Immunization and Respiratory Diseases Centers for Disease Control and Prevention Atlanta Georgia USA
2. Division of Viral Diseases, National Center for Immunization and Respiratory Diseases Centers for Disease Control and Prevention Atlanta Georgia USA
3. Division of Birth Defects and Infant Disorders, National Center on Birth Defects and Developmental Disabilities Centers for Disease Control and Prevention Atlanta Georgia USA