1. Department of Oncology, Odense University Hospital , Odense, Denmark
2. Danish Breast Cancer Group, Rigshospitalet, Copenhagen University Hospital , Copenhagen, Denmark
3. Department of Clinical Epidemiology, Clinical Institute, Aarhus University and Aarhus University Hospital , Aarhus, Denmark
4. Department of Plastic and Breast Surgery, Aarhus University Hospital , Aarhus, Denmark
5. Department of Oncology, Rigshospitalet, Copenhagen University Hospital , Copenhagen, Denmark