The late Elliott M. Marcus, MD, was Professor Emeritus of Neurology, University of Massachusetts School of Medicine, Lecturer in Neurology, Tufts University School of Medicine, Chairman Emeritus, Department of Neurology, Saint Vincent Hospital and Fallon Clinic, Worcester, MA.

Stanley Jacobson, PhD is Professor of Anatomy and Cellular Biology at Tufts University, Health Sciences Campus, Boston, MA. He is also a Fulbright Scholar.

Thomas D. Sabin, MD, is a Professor of Neurology at Tufts University School of Medicine, Tufts Medical Center, Boston, MA.