MORTALITY OF ACUTE LOWER GASTROINTESTINAL BLEEDING: A PROSPECTIVE, MULTICENTRE, COHORT STUDY - Andrealli, A; Radaelli, F; Frazzoni, L; Repici, A; Mussetto, A; Spada, C; Manes, G; Segato, S; Musso, A; Giulio, ED; Manno, M; Nucci, GD; Festa, V; Leo, AD; Marini, M; Ferraris, L; Hassan, C; Fuccio, L; Paggi, S (Endoscopy, 2020)