1. DHHS/NIH/National Cancer Institute/Division of Cancer Epidemiology and Genetics/Biostatistics Branch; Bethesda; MD
2. Danish Breast Cancer Cooperative Group (DBCG); Rigshopitalet; Copenhagen; Denmark
3. Department of Oncology; Odense University Hospital, Institute of Clinical Research, University of Southern Denmark; Copenhagen; Denmark
4. Department of Pathology; Herlev Hospital; Herlev; Denmark
5. Department of Breast Surgery; Rigshopitalet; Copenhagen; Denmark