1. Department of Neurology (Z.A., R.C., B.S., M.M.), University of Massachusetts Medical School, Worcester.
2. Now with: Department of Neurology, Tufts University Medical School, MA (Z.A.).
3. Hematology and Oncology (C.M.), University of Massachusetts Medical School, Worcester.
4. Now with: Hematology and Oncology, University of Florida, Gainesville (C.M.).