1. Department of Pediatrics University of Pittsburgh School of Medicine Pittsburgh Pennsylvania USA
2. Department of Human Genetics University of Pittsburgh School of Public Health Pittsburgh Pennsylvania USA
3. Leiden University Medical Center Leiden The Netherlands
4. Department of Pediatrics Duke University Medical Center Durham North Carolina USA
5. National Phenylketonuria Alliance Eau Claire Wisconsin USA
6. Miller School of Medicine University of Miami Miami Florida USA
7. Department of Pediatrics Harvard Medical School Boston Massachusetts USA
8. Department of Pediatrics Albert Einstein College of Medicine and the Children's Hospital at Montefiore Bronx New York USA
9. Alexion AstraZeneca Rare Diseases Boston Massachusetts USA