1. Department of Biostatistics and Bioinformatics; Graduate School of Medicine; The University of Tokyo; Tokyo Japan
2. Department of Breast and Medical Oncology; National Cancer Center Hospital; Tokyo Japan
3. Department of Experimental Therapeutics; National Cancer Center Hospital; Tokyo Japan
4. Investigational Drug Branch; Cancer Therapy Evaluation Program; Division of Cancer Treatment and Diagnosis; National Cancer Institute, National Institute of Health; Rockville MD USA
5. Statistical Analysis Section; Center for Advanced Medicine and Clinical Research; Nagoya University Hospital; Nagoya Japan
6. Biometric Research Program; Division of Cancer Treatment and Diagnosis; National Cancer Institute; National Institute of Health; Rockville MD USA