T03.02.4 SURVEILLANCE AND CONTROL OF INFECTION AND COLONIZATION BY MDR GERMS IN PATIENTS UNDERGOING TO ERCP: EFFECTIVENESS OF MEASURES OF INFECTION CONTROL. (1st October 2020) - De Grazia, F.; Ragni, S.; Marone, P.; Bardone, M.; Mauro, A.; Strada, E.; Rovedatti, L.; Pozzi, L.; Seminari, E.; Corbella, M.; Marena, C.; Muzzi, A.; et al.