1. Department of Medicine and
2. Department of Flow and Image Cytometry, Roswell Park Cancer Institute, Buffalo, NY;
3. Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE;
4. Department of Immunology, Roswell Park Cancer Institute, Buffalo, NY; and
5. Clinica Universidad de Navarra, Centro de Investigación Médica Aplicada, Instituto de Investigación Sanitaria de Navarra, Pamplona, Spain