1. Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, 986805 Nebraska Medical Center, Omaha, NE 68198-6805.
2. Breast Diagnostic Clinic, Internal Medicine, Mayo Clinic, 200 First Street, SW, Rochester, MN 55905.
3. Department of Medical Oncology, Mayo Clinic, 200 First Street, SW, Rochester, MN 55905.
4. Department of Environmental, Agricultural and Occupational Health, College of Public Health, University of Nebraska Medical Center, 985110 Nebraska Medical Center, Omaha, NE 68198-5110.