1. Department of Neurology and Neurotherapeutics University of Texas Southwestern Medical Center Dallas Texas
2. Department of Pathology University of Texas Southwestern Medical Center Dallas Texas
3. The Moody Foundation Flow Cytometry Facility Children's Research Institute University of Texas Southwestern Medical Center Dallas Texas
4. Department of Neurology The Ohio State University Columbus Ohio
5. Neurology Section VA North Texas Health Care System, Medical Service Dallas Texas
6. Department of Neurology Klinikum rechts der Isar Technische Universität München Munich Germany