P.07.24 AZATHIOPRINE VS MESALAMINE FOR PREVENTION OF POST-OPERATIVE CLINICAL RELAPSE IN CROHN'S DISEASE PATIENTS WITH SEVERE ENDOSCOPIC RECURRENCE: DATA ON EFFICACY AND SAFETY FROM AN IG-IBD MULTICENTER RANDOMIZED DOUBLE-BLIND DOUBLE-DUMMY TRIAL. (25th March 2019) - Orlando, A.; Mocciaro, F.; Ventimiglia, M.; Renna, S.; Scimeca, D.; Rispo, A.; Scribano, M.L.; Testa, A.; Aratari, A.; Bossa, F.; Angelucci, E.; Onali, S.; et al.