Article info
Letter
Managing the selection of placebo group switched to experimental treatment group in post-randomised controlled trial extension studies
- Correspondence to Professor Maya H Buch, Centre for Musculoskeletal Research, The University of Manchester, Manchester M13 9PL, UK; maya.buch{at}manchester.ac.uk
Citation
Managing the selection of placebo group switched to experimental treatment group in post-randomised controlled trial extension studies
Publication history
- Received November 1, 2021
- Accepted December 30, 2021
- First published January 13, 2022.
Online issue publication
April 08, 2022
Article Versions
- Previous version (13 January 2022).
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© Author(s) (or their employer(s)) 2022. No commercial re-use. See rights and permissions. Published by BMJ.