1. Advanced Imaging Research Center
2. Department of Radiology
3. Department of Internal Medicine
4. VA North Texas Health Care System, Dallas, Texas 75216
5. Department of Biochemistry and Molecular Biophysics, Arizona Cancer Center, University of Arizona, Tucson, Arizona, and the H. Lee Moffitt Cancer Center & Research Institute, Tampa, Florida 33612
6. Department of Chemistry, University of Texas at Dallas, Richardson, Texas 75083