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Efficacy of azathioprine versus mesalazine in postoperative Crohn's disease–The Authors' response
  1. Walter Reinisch1,
  2. Eduard F Stange2,
  3. on behalf of the International AZT-2 Study Group
  1. 1Abteilung Gastroenterologie und Hepatologie, Universitätsklinik für Innere Medizin III, Vienna, Austria
  2. 2Robert-Bosch Krankenhaus, Innere Medizin I, Stuttgart, Germany
  1. Correspondence to Walter Reinisch, Universitätsklinik für Innere Medizin III, Waehringer Guertel 18–20, Vienna A-1090, Austria; walter.reinisch{at}

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We thank Dr Ford for his comments1 on our recent paper in Gut entitled ‘Azathioprine versus mesalazine for prevention of postoperative clinical recurrence in patients with Crohn's disease with endoscopic recurrence: efficacy and safety results of a randomised, double-blind, double-dummy multi-centre trial’.2 With regard to our power calculation assuming a difference in treatment effect of 35% in favour of azathioprine, although two previous …

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