1 Division of Neuroradiology, Department of Radiology, Children's Hospital of Philadelphia, Philadelphia, PA.
2 Mitochondrial Medicine Frontier Program, Division of Human Genetics, Department of Pediatrics, Children's Hospital of Philadelphia, Philadelphia, PA.
3 Department of Pediatrics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA.
4 Program for the Study of Neurodevelopment in Rare Disorders, Children's Hospital of Pittsburgh of University of Pittsburgh Medical Center, Pittsburgh, PA.