1. aDepartments of Physical Medicine Rehabilitation
2. bPediatrics, University of Pittsburgh, Pittsburgh, Pennsylvania
3. cOregon Center for Children and Youth with Special Health Needs, School of Public Health, Oregon Health and Science University-Portland State University, Portland, Oregon
4. dInstitute on Development and Disability, Oregon Health and Science University, Portland, Oregon
5. eThe Arc of the United States, Washington, District of Columbia
6. fFamily Voices of Minnesota, St. Paul, Minnesota
7. gCarolina Institute for Developmental Disabilities, University of North Carolina at Chapel Hill, Carrboro, North Carolina
8. hTitle V Maternal and Child Health, Colorado Department of Public Health and Environment
9. iHealth Resources and Services Administration, Rockville, Maryland
10. jAnn and Robert H. Lurie Children’s Hospital of Chicago, Chicago, Illinois
11. kDepartment of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, Illinois