1. Neurology Research Laboratory, Massachusetts General Hospital, and the Department of Bacteriology and Immunology, Harvard Medical School, Boston.
2. Resident in Neurology, Present address: Service de Chimie Microbienne, Institut Pasteur, Paris, France.
3. Massachusetts General Hospital, Boston, Mass. Present address: University of Belgrade, Faculty of Pharmacy, Microbiological Institute, Belgrade, Yugoslavia.
4. Harvard Medical School, and Associate Bacteriologist (Neurology), Massachusetts General Hospital, Boston, Mass.; National Neurologic Research Foundation Scientist.