1. Department of Internal Medicine,
2. Department of Pediatrics and Human Development, College of Human Medicine, Michigan State University, Grand Rapids, Michigan
3. Department of Pathology,
4. Pappajohn Biomedical Institute,
5. Department of Molecular Physiology and Biophysics, and
6. Department of Biomedical Engineering, and
7. Department of Neurology, Roy J. and Lucille A. Carver College of Medicine,
8. Howard Hughes Medical Institute, University of Iowa, Iowa City, Iowa;