Authors' Affiliations: 1Channing Laboratory, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School; 2Department of Epidemiology, Harvard School of Public Health; 3Department of Pathology, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts; 4Department of Surgery, Washington University School of Medicine, St. Louis, Missouri; and 5Department of Breast Medical Oncology, Dubai Hospital, Dubai, UAE (At 2011-03-31)