1 Vanderbilt University Medical Center, Department of Pathology, Microbiology and Immunology, Nashville, Tennessee; Yale University, Department of Laboratory Medicine, New Haven, Connecticut; Hematology and Stem Cell Transplantation Section, Division of Hematology/Oncology, Department of Medicine, Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tennessee. Electronic address: garrett.s.booth@vanderbilt.edu.