Laboratory of Tumor Immunology and Biology, Center for Cancer Research (PMA, JLG, NT, SM, JM, K-YT, PM, DWG, JS), Division of Cancer Prevention (RL), Biostatistics and Data Management Section, Center for Cancer Research (SMS), Medical Oncology Clinical Research Unit, Center for Cancer Research (AB, WD), National Cancer Institute, National Institutes of Health, Bethesda, Maryland (At 2005-08)