Charles J. Parker, M. D., is a Professor of Medicine in the Division of Hematology and Hematologic Malignancies, Department of Internal Medicine, at the University of Utah, the Huntsman Cancer Institute and the George E. Whalen VA Medical Center, Salt Lake City, UT. As a Hematologist, his clinical interests include paroxysmal nocturnal hemoglobinuria, hemochromatosis and porphyria.