Combined transient and peripheral defects in tetrahydrobiopterin synthesis.

From the Department of Genetics, Children's Hospital of Eastern Ontario, Ottawa, and the Department of Genetics and Pediatrics, Hospital for Sick Children, Toronto, Ontario, Canada; Vivigen Laboratories Inc., Santa Fe, New Mexico; Barrow Neurological Institute, Phoenix, Arizona; the Department of Medical Genetics, West Penn Hospital, Pittsburgh, Pennsylvania; and the Office of Nutrition Services, Arizona Department of Health Services, Phoenix