OC.02.3 DEVELOPING AND VALIDATING A DEATH SCORE RISK IN NONVARICEAL UPPER GI BLEEDING PATIENTS (RE.CO.DE SCORE): A PROSPECTIVE MULTICENTER COHORT STUDY. (September 2021) - Marmo, R.; Soncini, M.; Bucci, C.; Occhipinti, V.; Pellegrini, L.; Zullo, A.