1. Department of Radiology, Duke University Medical Center, 2301 Erwin Rd, Box 3808, Durham, NC 27710.
2. Evelyn H. Lauder Breast Center, New York, NY.
3. School of Medicine and Dentistry, University of Rochester Medical Center, Rochester, NY.
4. UH Cleveland Medical Center, Cleveland, OH.
5. Department of Radiology, University of Pennsylvania Medical Center, Philadelphia, PA.