Phenylketonuria

• The Children's Hospital — Aurora, Colorado, United States
• Emory Universty — Decatur, Georgia, United States
• Children's Memorial Hospital — Chicago, Illinois, United States
• University of Minnesota Medical Center-Fairview — Minneapolis, Minnesota, United States

• The Children's Hospital — Aurora, Colorado, United States
• University of Florida — Gainesville, Florida, United States
• Weisskopf Child Evaluation Center / University of Louisville — Louisville, Kentucky, United States
• University of Missouri — Columbia, Missouri, United States

• Boston Children's Hospital — Boston, Massachusetts, United States

• Children's Hospital of Boston — Boston, Massachusetts, United States
• University of Wisconsin-Madison — Madison, Wisconsin, United States

• Washington University — St Louis, Missouri, United States

• Boston Children's Hospital — Boston, Massachusetts, United States

• University of Missouri — Columbia, Missouri, United States

• Research Site — Graz, Austria
• Research site — Innsbruck, Austria
• Research Site — Brussels, Belgium
• Research Site — Edegem, Belgium

Not specified

• Children's Memorial Hospital — Chicago, Illinois, United States
• University of Minnesota Medical Center-Fairview — Minneapolis, Minnesota, United States
• Washington University Center for Applied Research Sciences — St Louis, Missouri, United States
• Mount Sinai Medical Center — New York, United States