Addition of mesalazine for subclinical post‐surgical endoscopic recurrence of Crohn's disease despite preventive thiopurine therapy: A case–control study
1. Hospital Universitari Germans Trias i Pujol, , Badalona, Catalonia, Spain;2. Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), , Badalona, Catalonia, Spain