1. Department of Internal Medicine Pappajohn Biomedical Institute Roy J and Lucille A Carver College of Medicine University of Iowa Iowa City Iowa USA
2. Department of Radiology Roy J and Lucille A Carver College of Medicine University of Iowa Iowa City Iowa USA
3. Roy J Carver, Department of Biomedical Engineering University of Iowa Iowa City Iowa USA
4. Department of Molecular Physiology and Biophysics Roy J and Lucille A Carver College of Medicine University of Iowa Iowa City Iowa USA