AF.55 ADHERENCE TO MESALAZINE AND IDENTIFICATION OF PATIENTS WITH ULCERATIVE COLITIS IN HEALTHCARE ADMINISTRATIVE DATABASES OF TUSCANY (ITALY). (September 2021) - Bertani, L.; Bartolini, C.; Ferraro, S.; Convertino, I.; Giometto, S.; Tillati, S.; Valdiserra, G.; Cappello, E.; Blandizzi, C.; Lucenteforte, E.; Gini, R.; Tuccori, M.; et al.