Conditional versus Non-Conditional Incentives to Maximise Return of Participant Completed Questionnaires in Clinical Trials: A Cluster Randomised Study Within a Trial Preprints uri icon

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authors

  • Cook, Johanna
  • Cook, Jonathan A
  • Bongard, Emily
  • Heneghan, Carl
  • Butler, Chris C

publication date

  • June 25, 2021