Affiliation: | (1) Edith Nourse Rogers Memorial Veterans Hospital, Bedford, MA;(2) Departments of Anatomy and Neurology, Boston University School of Medicine, 02215 Boston, MA, USA;(3) Department of Health Sciences, Boston University, 02215 Boston, MA, USA;(4) Boston University, 36 Cummington Street B-11, 02215 Boston, MA, USA |