1. Down Syndrome Program, Division of Medical Genetics and Metabolism, Department of Pediatrics Massachusetts General Hospital Boston Massachusetts USA
2. Department of Pediatrics Harvard Medical School Boston Massachusetts USA
3. Department of Neurology Harvard Medical School Boston Massachusetts USA
4. Boston Children's Hospital Down Syndrome Program Boston Children's Hospital Boston Massachusetts USA
5. Geisinger Health System Danville Pennsylvania USA
6. Mater Research Institute‐University of Queensland The University of Queensland South Brisbane Australia
7. Department of Pediatrics Duke University Medical Center Durham North Carolina USA
8. Biostatistics Center Massachusetts General Hospital Boston Massachusetts USA
9. Down Syndrome Center of Western Pennsylvania UPMC Children's Hospital of Pittsburgh Pittsburgh Pennsylvania USA
10. Pediatric and Infectious Disease Unit Bambino Gesù Children's Hospital Rome Italy