1. Department of Neuroscience and Pharmacology, University of Iowa Carver College of Medicine , Iowa City, IA 52242 , USA
2. Veterans Affairs Health Care System , Iowa City, IA 52242 , USA
3. Department of Pediatrics, University of Iowa Carver College of Medicine , Iowa City, IA 52242 , USA
4. Fraternal Order of Eagles Diabetes Research Center, University of Iowa Carver College of Medicine , Iowa City, IA 52242 , USA
5. Iowa Neuroscience Institute, University of Iowa Carver College of Medicine , Iowa City, IA 52242 , USA
6. Obesity Research and Education Initiative, University of Iowa Carver College of Medicine , Iowa City, IA 52242 , USA
7. Department of Internal Medicine, University of Iowa Carver College of Medicine , Iowa City, IA 52242 , USA