1. NSABP; University of Pittsburgh Cancer Institute and Magee Womens Hospital, Pittsburgh, PA; NSABP; Univ Pittsburgh, Biostatistical Center, Pittsburgh, PA; NSABP; Allegheny General Hospital, Pittsburgh, PA; University of Kentucky, Markey Cancer Center, Houston, TX; University of Texas, M.D. Anderson Cancer Center, Houston, TX; Novartis Pharmaceutical Corporation, East Hanover, NJ; Allegheny General Hospital, Pittsburgh, PA; Medical Oncology Branch, National Cancer Institute, Bethesda, MD