Institution: | (1) Department of Cellular and Molecular Biology, Merck Research Laboratories, R80Y-160, P. O. Box 2000, 07065 Rahway, NJ, USA;(2) Department of Animal Drug Evaluation, Merck Research Laboratories, 07065 Rahway, NJ, USA;(3) Present address: Experimental Station, E 400/5207, DuPont Merck Pharmaceutical Co., P.O. Box 80 400, 19880-0400 Wilmington, DE, USA |