Phenylketonurias

• Children's Hospital of Orange County Hospital — Orange, California, United States
• University of Minnesota — Minneapolis, Minnesota, United States
• Atlantic Health System — Morristown, New Jersey, United States
• University of Pittsburgh Medical Center — Pittsburgh, Pennsylvania, United States

• First Affiliated Hospital of Bengbu Medical College — Bengbu, Anhui, China
• Xinhua Hospital Affifiated to Shanghai Jiao Tong University School of Medicine — Shanghai, China

• Emory University Hospital Georgia Clinical Research Center — Atlanta, Georgia, United States
• The Emory Clinic — Atlanta, Georgia, United States

• University of Missouri — Columbia, Missouri, United States

• University Childrens Hospital Zürich — Zurich, Switzerland

• Center for Inherited Metabolic Diseases — Copenhagen, Denmark
• Copenhagen University Hospital, Rigshospitalet — Copenhagen, Denmark

• Cairo University — Dokki, Giza Governorate, Egypt

Not specified

• The First Affiliated Hospital of Bengbu Medical College — Bengbu, Anhui, China

• RTI International — Research Triangle Park, North Carolina, United States