1. BD Biosciences; San Jose; California
2. Institute for Immunity, Transplantation, and Infection; Department of Microbiology and Immunology; Stanford University School of Medicine; Stanford; California
3. Center for Immunotherapy, Roswell Park Cancer Institute, Buffalo; New York; New York
4. Duke Center for AIDS Research, Department of Surgery, Duke University Medical Center; Durham; North Carolina
5. Human Immunophenotyping Core, Diabetes Clinical Research Program, Benaroya Research Institute; Seattle; Washington
6. Immune Monitoring Core, Ludwig Center for Cancer Immunotherapy, Memorial Sloan-Kettering Cancer Center; New York; New York