1. Division of Child Neurology, Department of Pediatrics, Children's Hospital of Pittsburgh, University of Pittsburgh Medical Center, Pittsburgh, PA 15224, USA
2. Department of Neuroscience, Dietrich School of Arts and Science, University of Pittsburgh, Pittsburgh, PA 15260, USA
3. Center for Biological Imaging, University of Pittsburgh Medical Center, Pittsburgh, PA 15261, USA
4. Department of Cell Biology, University of Pittsburgh Medical Center, Pittsburgh, PA 15261, USA
5. Department of Neurology, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA
6. Department of Human Genetics, University of Pittsburgh Graduate School of Public Health, Pittsburgh, PA 15261, USA
7. Department of Neurology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA