1 Clinic for Radiology and Reference Center for Mammography Münster, University of Münster and University Hospital Münster, D-48149 Münster, Germany. Electronic address: heindel@uni-muenster.de.
2 Clinic for Radiology and Reference Center for Mammography Münster, University of Münster and University Hospital Münster, D-48149 Münster, Germany.
3 Institute of Epidemiology and Social Medicine, University of Münster and University Hospital Münster, D-48149 Münster, Germany.