1. Division of Infectious Diseases, Department of Medicine, Houston Methodist Hospital , Houston, Texas , USA
2. Department of Pathology, The University of Texas MD Anderson Cancer Center , Houston, Texas , USA
3. Department of Laboratory Medicine, Clinical Microbiology, The University of Texas MD Anderson Cancer Center , Houston, Texas , USA
4. Department of Blood and Marrow Transplant, Fred Hutchinson Cancer Research Center , Seattle, Washington , USA
5. Division of Foodborne, Free-Living and Intestinal Amebas (FLIA) Laboratory, Waterborne and Environmental Diseases, National Center for Emerging and Zoonotic Infectious Diseases, Centers for Disease Control and Prevention , Atlanta, Georgia , USA
6. Department of Infectious Diseases, Infection Control, and Employee Health, The University of Texas MD Anderson Cancer Center , Houston, Texas , USA