1Tabar L,Yen MF,Vitak B,et al.Mammography sereening andmortality in breast cancer patients:20-year follow-up before andafter introduction of screeing[J].Lancet,2003,361(9367):1405-1410.
9Chen SC,Cheung YC,Su CH,et al.Anealysis of sonog raphic feature for the differ entiation of benig nandmalignant breast tumor of differ entsizes[J].Ultrasound Obstet Gynecol,2004,23(2):188-193.