1 Division of Congenital and Developmental Disorders, National Center on Birth Defects and Developmental Disabilities, US Centers for Disease Control and Prevention, Atlanta, GA 30341, USA. Electronic address: sgilboa@cdc.gov.
2 Division of Vector-Borne Diseases, National Center for Emerging and Zoonotic Infectious Diseases, US Centers for Disease Control and Prevention, Fort Collins, CO, USA.
3 Division of Congenital and Developmental Disorders, National Center on Birth Defects and Developmental Disabilities, US Centers for Disease Control and Prevention, Atlanta, GA 30341, USA.