Marshall A. Lichtman, MD, is dean emeritus, and a former professor of medicine, biochemistry, and biophysics at the University of Rochester Medical Center in New York. He is a past president of the American Society of Hematology (ASH).Josef T. Prchal, MD, is a professor in the division of hematology and hematologic malignancies, a Huntsman Cancer Institute investigator, and a member of the Cell Response and Regulation Program and the Imaging, Diagnostics, and Therapeutics Program at the University of Utah.