1. Vascular Biology Center, Division of Hematology, Oncology & Transplantation, Department of Medicine, and
2. Department of Diagnostic & Biological Sciences, University of Minnesota, Minneapolis;
3. Division of Hematology, Oncology & Transplantation, Department of Medicine, University of Minnesota and Veterans Administration Medical Center, Minneapolis;
4. Minnesota Head and Neck Pain Clinic, St Paul;
5. Department of Dermatology, University of Minnesota, Minneapolis; and
6. Bio-Rad Laboratories, Hercules, CA