*Division of Human Development and Disability, National Center on Birth Defects and Developmental Disabilities (NCBDDD), Centers for Disease Control and Prevention, Atlanta, GA;
†Departments of Neurology, Neurobiology and Anatomy, Brain and Cognitive Sciences and Pediatrics, University of Rochester, Rochester, NY;
‡Department of Pediatrics, Division of Developmental Medicine, University of Washington, Seattle, WA;
§Office of Epidemiology and Research, Maternal and Child Health Bureau, Health Resources and Services Administration, Rockville, MD;
‖Division of Health Interview Statistics, National Center for Health Statistics, Centers for Disease Control and Prevention, Hyattsville, MD.
Address for reprints: Rebecca H. Bitsko, PhD, NCBDDD/CDC, 1600 Clifton Rd, MS E-88, Atlanta, GA 30333; e-mail: [email protected]
Disclosure: The authors declare no conflict of interest.
Received January , 2014
Accepted March , 2014