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Feasibility of surgical randomised controlled trials with a placebo arm: a systematic review
  1. Karolina Wartolowska1,2,
  2. Gary S Collins2,3,
  3. Sally Hopewell2,3,
  4. Andrew Judge1,2,4,
  5. Benjamin J F Dean1,2,
  6. Ines Rombach1,2,
  7. David J Beard1,2,5,
  8. Andrew J Carr1,2,5
  1. 1Oxford NIHR Musculoskeletal Biomedical Research Unit, Oxford, UK
  2. 2Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, Botnar Institute of Musculoskeletal Sciences, University of Oxford, Oxford, UK
  3. 3Centre for Statistics in Medicine, Oxford, UK
  4. 4MRC Lifecourse Epidemiology Unit, University of Southampton, Southampton General Hospital, Southampton, UK
  5. 5Royal College of Surgeons of England Clinical Trials Unit, Botnar Institute of Musculoskeletal Sciences, Oxford, UK
  1. Correspondence to Dr Karolina Wartolowska; karolina.wartolowska{at}

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