OC.02.9 CROSS-SECTIONAL EVALUATION OF TRANSMURAL HEALING IN PATIENTS WITH CROHN'S DISEASE ON MAINTENANCE TREATMENT WITH BIOLOGICS. (24th February 2016) - Rispo, A.; Mainenti, P.; Testa, A.; Imperatore, N.; De Palma, G.D.; Rea, M.; Maione, F.; Nardone, O.M.; Taranto, M.L.; Castiglione, F.