1. Department of SurgeryLeiden University Medical Center Leiden The Netherlands
2. Nottingham Breast Cancer Research Center, Division of Cancer and Stem Cells, School of MedicineThe University of Nottingham, Nottingham City Hospital Nottingham United Kingdom
3. Department of PathologyLeiden University Medical Center Leiden The Netherlands
4. Division of Molecular PathologyNetherlands Cancer Institute Amsterdam The Netherlands
5. Department of Biomedical Data SciencesLeiden University Medical Center Leiden The Netherlands