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Uncontrolled before-after studies: discouraged by Cochrane and the EMJ
  1. Correspondence to Professor Steve Goodacre, Medical Care Research Unit, University of Sheffield, 23 Nairn Street, Sheffield S10 1UL, UK; s.goodacre{at}sheffield.ac.uk
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Goodacre S
Uncontrolled before-after studies: discouraged by Cochrane and the EMJ

Publication history

  • Accepted March 6, 2015
  • First published March 27, 2015.
Online issue publication 
June 19, 2015

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