1. Neuroscience Program; Loyola University Medical Center; Maywood Illinois 60153
2. Research and Development Service; Hines Veterans Administration Hospital; Hines Illinois 60141
3. Anatomy and Cell Biology Department; Indiana University School of Medicine; Indianapolis Indiana 46220
4. Research and Development Service; Roudebush Veterans Administration Medical Center; Indianapolis Indiana 46202
5. Department of Molecular Virology, Immunology, and Medical Genetics; The Ohio State University; Columbus Ohio 43210