1 Department of Infectious Diseases, Infection Control and Employee Health, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.
2 Department of General Internal Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.
3 Department of Infectious Diseases, Infection Control and Employee Health, The University of Texas MD Anderson Cancer Center, Houston, TX, USA. htorres@mdanderson.org.
4 Department of Gastroenterology, Hepatology, and Nutrition, The University of Texas MD Anderson Cancer Center, Houston, TX, USA. htorres@mdanderson.org.