1. Division of Oncology, Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA.
2. Department of Pathology, Washington University School of Medicine, St. Louis, MO 63110, USA.
3. Division of Hematology, Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA.
4. Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, 2333 ZC Leiden, Netherlands.
5. Division of Rheumatology, Department of Pediatrics, Washington University School of Medicine, St. Louis, MO 63110, USA.