1. 1Breast Diagnostic Clinic, Mayo Clinic, Rochester, Minnesota.
2. 2Mayo Clinic Cancer Center, Mayo Clinic, Rochester, Minnesota.
3. 3Department of Radiation Oncology, Max Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, Manitoba, Canada.
4. 4Department of Quantitative Health Sciences, Mayo Clinic, Rochester, Minnesota.
5. 5Department of Medical Oncology and Hematology, Max Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, Manitoba, Canada.
6. 6Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota.
7. 7Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, Minnesota.