1. Department of Pathology, University of Texas Medical Branch , Galveston, Texas , USA
2. Department of Pathology and Laboratory Medicine, Boston Medical Center and Boston University Chobanian & Avedisian School of Medicine , Boston, Massachusetts , USA
3. Department of Radiology, University of Texas Medical Branch , Galveston, Texas , USA
4. Department of Biochemistry and Molecular Biology, University of Texas Medical Branch , Galveston, Texas , USA
5. Department of Internal Medicine-Infectious Diseases, University of Texas Medical Branch , Galveston, Texas , USA