1. From the Departments of Computer Science (A.D.L., M.N., M.L.) and Public Health (M.C.v.E.C., E.L.), University of Copenhagen, Universitetsparken 1, 2100 Copenhagen Ø, Denmark; Department of Breast Examinations, Gentofte Hospital, Gentofte, Denmark (I.V.); and Department of Radiology and Nuclear Medicine, Radboud University Medical Centre and ScreenPoint Medical, Nijmegen, the Netherlands (N.K.).