1. Section of Developmental Pediatrics, Department of Pediatrics, University of Colorado, Aurora, Colorado;
2. Contributed equally as co-first authors
3. Children’s Center for Communication/Beverly School for the Deaf, Beverly, Massachusetts;
4. Boston Children’s Hospital, Boston, Massachusetts;
5. Harvard Medical School, Harvard University, Boston, Massachusetts;
6. Gallaudet University, Washington, District of Columbia; and
7. Division of Developmental and Behavioral Pediatrics, Department of Pediatrics, Cincinatti Children’s Hospital Medical Center, University of Cincinnati, Cincinnati, Ohio