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3Smith R A,Cokkinides V,Eyre H J.Cancer screening in the Unit-ed States 2007:a review of current guidelines,practices,and pros-pects[J].CA Cancer J Clin,2007,57:90-104.
4Abrahamsson P A,Tinzl M.Do we need PSA and early detection ofprostate cancer?[J].Eur Urol Suppl,2008,7:393-395.
