[1] Georgetown Univ, Med Ctr, Dept Oncol, Washington, DC 20007 USA
[2] Georgetown Lombardi Comprehens Canc Ctr, Canc Prevent & Control Program, Washington, DC USA
[3] Georgetown Univ, Med Ctr, Dept Biostat Bioinformat & Biomath, Washington, DC 20007 USA
[4] Georgetown Lombardi Comprehens Canc Ctr, Washington, DC USA
[5] Georgetown Lombardi Comprehens Canc Ctr, Breast Canc Program, Washington, DC USA
[6] Georgetown Univ, Med Ctr, Dept Med, Washington, DC 20007 USA
[7] Duke Univ, Dept Med, Durham, NC USA
[8] Duke Univ, Ctr Study Aging & Human Dev, Durham, NC USA
[9] Univ N Carolina, Dept Med, Chapel Hill, NC USA
[10] Harvard Univ, Sch Med, Dana Farber Canc Inst, Dept Med Oncol, Boston, MA 02115 USA
[11] Mem Sloan Kettering Canc Ctr, Dept Med, New York, NY 10021 USA
[12] Harvard Univ, Sch Med, Dana Farber Canc Inst, Dept Biostat & Computat Biol, Boston, MA 02115 USA