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Managing the selection of placebo group switched to experimental treatment group in post-randomised controlled trial extension studies

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Footnotes

  • Handling editor Josef S Smolen

  • Contributors MHB drafted and WPM and MB revised the manuscript. All authors approved the final submitted manuscript.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Disclaimer MHB: The views expressed are those of the author(s) and not necessarily those of the NIHR or the Department of Health and Social Care.

  • Competing interests None declared.

  • Patient and public involvement Patients and/or the public were not involved in the design, or conduct, or reporting, or dissemination plans of this research.

  • Provenance and peer review Not commissioned; externally peer reviewed.

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