title: Response to comments by Kalager et al. and Zahl et al.
authors: Department of Research, Cancer Registry of Norway, Oslo, Norway.
authors: Ragnhild Sørum
authors: RS
authors: Falk
authors: Solveig
authors: S
authors: Hofvind
authors: Per
authors: P
authors: Skaane
authors: Tor
authors: T
authors: Haldorsen
mesh_terms: D001943:Breast Neoplasms / Q000175:diagnosis*; D002285:Carcinoma, Intraductal, Noninfiltrating / Q000175:diagnosis*; D003951:Diagnostic Errors; D005260:Female; D006801:Humans; D008327:Mammography; D009361:Neoplasm Invasiveness / Q000175:diagnosis*