Criticisms of Swedish mammography trials were wrong

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Abstract
EDITOR—In their attempt to answer Rosén and Rehnqvist's criticism of their study,1 Sjönell and Ståhle inaccurately attack the Swedish randomised trials of breast cancer screening and in particular the two county study.2 They allege that the control group was invited to screening and that this was contrary to the trial protocol. In fact, the protocol stated that the control group was to be kept …