1 Department of Pediatrics, St. Christopher's, Hospital for Children, 160 E Erie Ave, Philadelphia, PA, USA. jm4785@drexel.edu.
2 Division of Neuroradiology, Department of Radiology, Children's Hospital of Philadelphia, Philadelphia, PA, USA. jm4785@drexel.edu.
3 Clinical Research Group, Escuela de Medicina Y Ciencias de La Salud, Universidad del Rosario, Bogota, DC, Colombia. jm4785@drexel.edu.
4 Division of Neuroradiology, Department of Radiology, Children's Hospital of Philadelphia, Philadelphia, PA, USA.
5 Centre for Statistical Consultation, Stellenbosch University, Stellenbosch, South Africa.
6 Division of Human Genetics, Department of Pediatrics, Mitochondrial Medicine Frontier Program, Children's Hospital of Philadelphia, Philadelphia, PA, USA.
7 Department of Pediatrics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA.
8 Department of Radiology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA.