1. From the Division of Medical Oncology, Department of Medicine, European Institute of Oncology, Milan, Italy; International Breast Cancer Study Group Coordinating Center, Bern; Oncology Institute of Southern Switzerland, Bellinzona & Lugano, Switzerland; International Breast Cancer Study Group Statistical Center, Department of Biostatistics and Computational Biology, Dana-Farber Cancer Institute; and Frontier Science and Technology Research Foundation, Boston, MA