OC.16.1 TIMING FROM ADMISSION VS TIMING FROM BLEEDING IN ACUTE UPPER GASTROINTESTINAL BLEEDING (UGIB): A MULTICENTER COHORT STUDY. (May 2022) - Marmo, R.; Soncini, M.; Bucci, C.; Marmo, C.; Occhipinti, V.; Zullo, A.; Riccioni, M.E.; ,