Justin L Grobe1, Curt D Sigmund2. 1. From the Department of Pharmacology and Center for Hypertension Research, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City. 2. From the Department of Pharmacology and Center for Hypertension Research, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City. curt-sigmund@uiowa.edu.