1. Down Syndrome Clinic and Research Center, Kennedy Krieger Institute Baltimore Maryland USA
2. Adult Down Syndrome Clinic, Christiana Care Health System Wilmington Delaware USA
3. Massachusetts General Hospital Boston Massachusetts USA
4. Lutheran General Hospital, Advocate Adult Down Syndrome Center Park Ridge Illinois USA
5. Adult Down Syndrome Clinic, Montefiore Hospital Pittsburgh Pennsylvania USA
6. Adults with Down Syndrome Specialty Clinic, University of Kansas Medical Center Kansas City Missouri USA
7. Department of Pediatrics and Child Neurology Lenox Baker Children's Hospital Durham North Carolina USA
8. Department of Gynecology and Obstetrics Johns Hopkins Hospital Baltimore Maryland USA