1. Department of Pharmacology (S.Y., P.T., M.A.), Carver College of Medicine, The University of Iowa, Iowa City, Iowa 52242;
2. Centre de Recherche en Cancérologie de l'Université Laval (J.C.), Québec, Canada G1R 2J6;
3. Division of Clinical and Reproductive Sciences (C.K.), Department of Clinical Sciences, University of Kentucky, Kentucky 40506