1. Department of Pharmacology, University of Iowa, Iowa City, Iowa, U.S.A.
2. Fraternal Order of Eagles Diabetes Research Center, University of Iowa, Iowa City, Iowa, U.S.A.
3. Obesity Research and Education Initiative, University of Iowa, Iowa City, Iowa, U.S.A.
4. Center for Hypertension Research, University of Iowa, Iowa City, Iowa, U.S.A.