1. Advanced Imaging Research Center; University of Texas Southwestern Medical Center; Dallas Texas USA
2. Department of Radiology; University of Texas Southwestern Medical Center; Dallas Texas USA
3. MR Cleveland Advanced Diagnostic Imaging; Philips Healthcare; Cleveland Ohio USA
4. Department of Chemistry; University of Texas at Dallas; Richardson Texas USA
5. Department of Internal Medicine; University of Texas Southwestern Medical Center; Dallas Texas USA
6. Medical Service; VA North Texas Health Care System; Dallas Texas USA