1. Department of Chemistry Southern Methodist University Dallas TX 75275-0314 USA
2. Prognostic Imaging Research Laboratory Pre-clinical Imaging Section Department of Radiology UT Southwestern Medical Center Dallas TX 75390-9058 USA
3. X-ray Diffraction Facility Department of Chemistry and Biochemistry Texas Tech University Lubbock TX 79409-1061 USA
4. Department of Chemistry and Biochemistry Baylor University Waco TX 76798-7348 USA