1. From the Department of Internal Medicine, Yale University School of Medicine, New Haven, CT; Department of Biostatistics and Computational Biology, Dana-Farber Cancer Institute and Department of Biostatistics, Harvard School of Public Health, Boston, MA; Division of Hematology/Oncology, Milton S. Hershey Medical Center, Hershey, PA; Cancer Center of Kansas, Wichita, KS; the Sidney Kimmel Cancer Center, Johns Hopkins University, Baltimore, MD