1. Department of Radiology; University of Texas Southwestern Medical Center; Dallas Texas USA
2. Advanced Imaging Research Center; University of Texas Southwestern Medical Center; Dallas Texas USA
3. Philips Medical Systems; Cleveland Ohio USA
4. Department of Internal Medicine; University of Texas Southwestern Medical Center; Dallas Texas USA
5. Department of Clinical Science; University of Texas Southwestern Medical Center; Dallas Texas USA
6. Charles and Jane Pak Center of Mineral Metabolism and Clinical Research; University of Texas Southwestern Medical Center; Dallas Texas USA