1. Department of Radiology, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd, Dallas, TX 75390-9316.
2. Department of Radiology, UT Health Science Center, Houston, TX.
3. Department of Clinical Sciences, University of Texas Southwestern Medical Center, Dallas, TX.
4. Department of Anesthesiology and Pain Management, University of Texas Southwestern Medical Center, Dallas, TX.
5. Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX.
6. McDermott Center for Human Growth and Development, University of Texas Southwestern Medical Center, Dallas, TX.