Walter H. Wriston Distinguished Professor
Director of Endoscopic Research and Development
Department of Gastroenterology, Hepatology and Nutrition
The University of Texas MD Anderson Cancer Center
Houston, Texas
Director of Endoscopic Research and Development
Department of Gastroenterology, Hepatology and Nutrition
The University of Texas MD Anderson Cancer Center
Houston, Texas

I work as a gastroenterologist and endoscopist at a busy tertiary cancer center.
Many patients being treated there are very sick: Platelets are low, absolute neutrophil counts are creeping to the bottom, skin may be pale from