1. Breast Cancer Group, Cell Death and Metabolism, Danish Cancer Society Research Center, Copenhagen, Denmark;
2. Department of Surgery, Zealand University Hospital, Koege, Denmark;
3. Department of Pathology, Herlev Hospital, Herlev, Denmark;
4. International Breast Cancer Study Group (IBCSG) Statistical Center, Dana-Farber Cancer Institute, Boston, MA, USA;
5. Danish Breast Cancer Cooperative Group (DBCG), Rigshospitalet, Copenhagen, Denmark