1. Department of Medical Epidemiology and Biostatistics, Karolinska institutet, SE-171 77 Stockholm, Sweden.
2. Elizabeth Wende Breast Care, Rochester, NY 14620, USA.
3. Radiology Associates of Burlington County, Hainesport, NJ 08036, USA.
4. Zwanger-Pesiri Radiology, Lindenhurst, NY 11757, USA.
5. Department of Radiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.
6. Boca Raton Regional Hospital, Boca Raton, FL 33486, USA.
7. Department of Oncology, Södersjukhuset University Hospital, Stockholm SE-118 61, Sweden.