1. Neuropsychology Service, Waukesha Memorial Hospital, Waukesha, Wisconsin
2. Department of Neurology, Medical College of Wisconsin, Milwaukee, Wisconsin
3. Chicago Neurological Institute, Chicago, Illinois
4. Department of Neurology, Northwestern University Medical School, Evanston, Illinois
5. Department of Neurology, Loyola University Medical School, Chicago, Illinois
6. Center for Addiction and Behavioral Health Research, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin