Methods to influence response to postal questionnaires

  • P Edwards, I Roberts, M Clarke, C DiGuiseppi, S Pratap, R Wentz, I Kwan
  • Cochrane Database of Systematic Reviews, April 2001, Wiley
  • DOI: 10.1002/14651858.mr000008

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http://dx.doi.org/10.1002/14651858.mr000008

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