Institution: | (1) Department of Physiology, Upstate Medical Center, State University of New York, 13210 Syracuse, New York, USA;(2) Present address: Department of Physiology, Haryard Medical School, 25 Shattuck Street, 02115 Boston, Mass., USA;(3) Present address: Microscopic Anatomy Program, Northeastern Ohio Universities College of Medicine, P.O. Box 95, 44272 Rootstown, Ohio, USA |