1. The University of Rochester Medical Center; Department of Neurology; 601 Elmwood Avenue, Box 673 Rochester New York 14642 USA
2. Psychometric Consultant; Chicago Illinois USA
3. Department of Neurology; University of Utah; Salt Lake City UT USA
4. The United States Government Accountability Office; Retired
5. The University of Rochester Medical Center; Department of Biostatistics and Computational Biology; Rochester New York USA
6. Northwestern University Feinberg School of Medicine; Chicago Illinois USA
7. David Geffen School of Medicine; UCLA Medical Center; Los Angeles California USA
8. Greater Los Angeles VA HealthCare System; Los Angeles California USA