1 Department of Pathology, The George Washington University Hospital, Washington, DC, USA.
2 Department of Medicine, Section of Hematology/Oncology, George Washington University, Washington, DC, USA; Department of Medicine, Section of Hematology, Veterans Affairs Medical Center, Washington, DC, USA.
3 Knight Cancer Institute, Oregon Health & Science University, Portland, OR, USA.
4 Children's National Medical Center, Washington, DC, USA.
5 Department of Pathology, The George Washington University Hospital, Washington, DC, USA; Department of Pathology and Laboratory Medical Service, Veterans Health Administration, Washington, DC, USA. Electronic address: Victor.Nava@va.gov.