title: If no difference in effectiveness is found between two treatments it may be because the treatments are similarly ineffective.
authors.affiliation: 1 Clinical Operation Research Unit, University College London, London, UK ; 2 Wales Cancer Trials Unit, Cardiff University, Cardiff, UK ; 3 Division of Surgery, University College London, London, UK.
authors.forename: Tom
authors.initials: T
authors.lastname: Treasure
authors.affiliation: 1 Clinical Operation Research Unit, University College London, London, UK ; 2 Wales Cancer Trials Unit, Cardiff University, Cardiff, UK ; 3 Division of Surgery, University College London, London, UK.
authors.forename: Fergus
authors.initials: F
authors.lastname: Macbeth
authors.affiliation: 1 Clinical Operation Research Unit, University College London, London, UK ; 2 Wales Cancer Trials Unit, Cardiff University, Cardiff, UK ; 3 Division of Surgery, University College London, London, UK.
authors.forename: Christopher
authors.initials: C
authors.lastname: Russell